public function start_el(&$output, $item, $depth = 0, $args = null, $id = 0)
{
    if (isset($args->item_spacing) && 'discard' === $args->item_spacing) {
        $t = '';
        $n = '';
    } else {
        $t = "\t";
        $n = "\n";
    }
    $indent = ($depth) ? str_repeat($t, $depth) : '';

    $classes = empty($item->classes) ? array() : (array) $item->classes;
    $classes[] = 'nav-item';
    $classes[] = 'menu-item-' . $item->ID;

    // 处理下拉菜单
    if (in_array('menu-item-has-children', $classes)) {
        $classes[] = 'dropdown';
        $classes[] = 'dmenu';
        
        // 如果是三级菜单，添加子菜单类
        if ($depth == 1) {
            $classes[] = 'dropdown-submenu';
        }
    }

    /**
     * Filters the arguments for a single nav menu item.
     *
     * @since 4.4.0
     *
     * @param stdClass $args  An object of wp_nav_menu() arguments.
     * @param WP_Post  $item  Menu item data object.
     * @param int      $depth Depth of menu item. Used for padding.
     */
    $args = apply_filters('nav_menu_item_args', $args, $item, $depth);

    /**
     * Filters the CSS classes applied to a menu item's list item element.
     *
     * @since 3.0.0
     * @since 4.1.0 The `$depth` parameter was added.
     *
     * @param array    $classes The CSS classes that are applied to the menu item's `<li>` element.
     * @param WP_Post  $item    The current menu item.
     * @param stdClass $args    An object of wp_nav_menu() arguments.
     * @param int      $depth   Depth of menu item. Used for padding.
     */
    $class_names = join(' ', apply_filters('nav_menu_css_class', array_filter($classes), $item, $args, $depth));
    $class_names = $class_names ? ' class="' . esc_attr($class_names) . '"' : '';

    /**
     * Filters the ID applied to a menu item's list item element.
     *
     * @since 3.0.1
     * @since 4.1.0 The `$depth` parameter was added.
     *
     * @param string   $menu_id The ID that is applied to the menu item's `<li>` element.
     * @param WP_Post  $item    The current menu item.
     * @param stdClass $args    An object of wp_nav_menu() arguments.
     * @param int      $depth   Depth of menu item. Used for padding.
     */
    $id = apply_filters('nav_menu_item_id', 'menu-item-' . $item->ID, $item, $args, $depth);
    $id = $id ? ' id="' . esc_attr($id) . '"' : '';

    $output .= $indent . '<li' . $id . $class_names . '>';

    $atts = array();
    $atts['title'] = !empty($item->attr_title) ? $item->attr_title : '';
    $atts['target'] = !empty($item->target) ? $item->target : '';
    $atts['rel'] = !empty($item->xfn) ? $item->xfn : '';
    $atts['href'] = !empty($item->url) ? $item->url : '';
    $atts['class'] = 'nav-link';

    // 处理下拉菜单链接
    if (in_array('menu-item-has-children', $item->classes)) {
        $atts['class'] .= ' dropdown-toggle';
        $atts['data-toggle'] = 'dropdown';
        $atts['role'] = 'button';
        $atts['aria-haspopup'] = 'true';
        $atts['aria-expanded'] = 'false';
    }

    /**
     * Filters the HTML attributes applied to a menu item's anchor element.
     *
     * @since 3.6.0
     * @since 4.1.0 The `$depth` parameter was added.
     *
     * @param array    $atts {
     *     The HTML attributes applied to the menu item's `<a>` element, empty strings are ignored.
     *
     *     @type string $title  Title attribute.
     *     @type string $target Target attribute.
     *     @type string $rel    The rel attribute.
     *     @type string $href   The href attribute.
     * }
     * @param WP_Post  $item  The current menu item.
     * @param stdClass $args  An object of wp_nav_menu() arguments.
     * @param int      $depth Depth of menu item. Used for padding.
     */
    $atts = apply_filters('nav_menu_link_attributes', $atts, $item, $args, $depth);

    $attributes = '';
    foreach ($atts as $attr => $value) {
        if (is_scalar($value) && '' !== $value && false !== $value) {
            $value = ('href' === $attr) ? esc_url($value) : esc_attr($value);
            $attributes .= ' ' . $attr . '="' . $value . '"';
        }
    }

    /** This filter is documented in wp-includes/post-template.php */
    $title = apply_filters('the_title', $item->title, $item->ID);

    /**
     * Filters a menu item's title.
     *
     * @since 4.4.0
     *
     * @param string   $title The menu item's title.
     * @param WP_Post  $item  The current menu item.
     * @param stdClass $args  An object of wp_nav_menu() arguments.
     * @param int      $depth Depth of menu item. Used for padding.
     */
    $title = apply_filters('nav_menu_item_title', $title, $item, $args, $depth);

    $item_output = $args->before;
    $item_output .= '<a' . $attributes . '>';
    $item_output .= $args->link_before . $title . $args->link_after;
    $item_output .= '</a>';
    $item_output .= $args->after;

    /**
     * Filters a menu item's starting output.
     *
     * The menu item's starting output only includes `$args->before`, the opening `<a>`,
     * the menu item's title, the closing `</a>`, and `$args->after`. Currently, there is
     * no filter for modifying the opening and closing `<li>` for a menu item.
     *
     * @since 3.0.0
     *
     * @param string   $item_output The menu item's starting HTML output.
     * @param WP_Post  $item        Menu item data object.
     * @param int      $depth       Depth of menu item. Used for padding.
     * @param stdClass $args        An object of wp_nav_menu() arguments.
     */
    $output .= apply_filters('walker_nav_menu_start_el', $item_output, $item, $depth, $args);
}<br />
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{"id":341,"date":"2026-07-22T16:11:10","date_gmt":"2026-07-22T08:11:10","guid":{"rendered":"https:\/\/www.huaiyesucheng.com\/?p=341"},"modified":"2026-07-22T16:11:10","modified_gmt":"2026-07-22T08:11:10","slug":"t07","status":"publish","type":"post","link":"https:\/\/www.huaiyesucheng.com\/ar\/t07\/","title":{"rendered":"T07"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-325 aligncenter\" src=\"http:\/\/www.huaiyesucheng.com\/wp-content\/uploads\/2026\/07\/T07.jpg\" alt=\"\" width=\"600\" height=\"500\" srcset=\"https:\/\/www.huaiyesucheng.com\/wp-content\/uploads\/2026\/07\/T07.jpg 600w, https:\/\/www.huaiyesucheng.com\/wp-content\/uploads\/2026\/07\/T07-300x250.jpg 300w, https:\/\/www.huaiyesucheng.com\/wp-content\/uploads\/2026\/07\/T07-14x12.jpg 14w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<table style=\"width: 100%; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; background-color: #f9f9f9; border: 1px solid #ddd;\">\n<thead>\n<tr style=\"background-color: #2a5298; color: #ffffff; text-align: left;\">\n<th style=\"padding: 12px 15px; border: 1px solid #ddd; font-weight: bold;\">Parameter<\/th>\n<th style=\"padding: 12px 15px; border: 1px solid #ddd; font-weight: bold;\">Specification<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background-color: #ffffff;\">\n<td style=\"padding: 10px 15px; border: 1px solid #ddd;\">Driving Mode<\/td>\n<td style=\"padding: 10px 15px; border: 1px solid #ddd;\">Gravity action<\/td>\n<\/tr>\n<tr style=\"background-color: #f4f6f9;\">\n<td style=\"padding: 10px 15px; border: 1px solid #ddd;\">Running Area<\/td>\n<td style=\"padding: 10px 15px; border: 1px solid #ddd;\">1200 \u00d7 400 mm<\/td>\n<\/tr>\n<tr style=\"background-color: #ffffff;\">\n<td style=\"padding: 10px 15px; border: 1px solid #ddd;\">Equipment Size<\/td>\n<td style=\"padding: 10px 15px; border: 1px solid #ddd;\">1210 \u00d7 680 \u00d7 1125 mm<\/td>\n<\/tr>\n<tr style=\"background-color: #f4f6f9;\">\n<td style=\"padding: 10px 15px; border: 1px solid #ddd;\">Max User Weight<\/td>\n<td style=\"padding: 10px 15px; border: 1px solid #ddd;\">160 kg<\/td>\n<\/tr>\n<tr style=\"background-color: #ffffff;\">\n<td style=\"padding: 10px 15px; border: 1px solid #ddd;\">Weight<\/td>\n<td style=\"padding: 10px 15px; border: 1px solid #ddd;\">60 kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"<p>Parameter Specification Driving Mode Gravity action Running Area 1200 \u00d7 400 mm Equipment Size 1210 \u00d7 680 \u00d7 1125 mm Max User Weight 160 kg Weight 60 kg<\/p>","protected":false},"author":1,"featured_media":325,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6,2,11],"tags":[],"class_list":["post-341","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aerobic","category-products","category-unpowered-treadmill"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.huaiyesucheng.com\/ar\/wp-json\/wp\/v2\/posts\/341","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.huaiyesucheng.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.huaiyesucheng.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.huaiyesucheng.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.huaiyesucheng.com\/ar\/wp-json\/wp\/v2\/comments?post=341"}],"version-history":[{"count":1,"href":"https:\/\/www.huaiyesucheng.com\/ar\/wp-json\/wp\/v2\/posts\/341\/revisions"}],"predecessor-version":[{"id":342,"href":"https:\/\/www.huaiyesucheng.com\/ar\/wp-json\/wp\/v2\/posts\/341\/revisions\/342"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.huaiyesucheng.com\/ar\/wp-json\/wp\/v2\/media\/325"}],"wp:attachment":[{"href":"https:\/\/www.huaiyesucheng.com\/ar\/wp-json\/wp\/v2\/media?parent=341"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.huaiyesucheng.com\/ar\/wp-json\/wp\/v2\/categories?post=341"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.huaiyesucheng.com\/ar\/wp-json\/wp\/v2\/tags?post=341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}