用于注入<span> 在菜单中，您可以使用以下代码进行操作：

//Setup this code into your current function.php file
add_filter(\'wp_nav_menu_items\',\'add_span_in_menu\', 10, 2);
function add_span_in_menu( $items, $args ) {
    if( $args->theme_location == \'primary\')  {

        $myContent = \'YOURCONTENT\'
        $items .=  \'<li><span class="number">\' . $myContent .  \'</span></li>\';

    }
    return $items;
}