以下代码段替换“您的菜单”菜单中的占位符菜单项。

    add_filter( \'wp_nav_menu_items\', \'add_item_to_menu\', 10, 2 );
    function add_item_to_menu( $items, $args ) {
        if ( $args->theme_location == \'your-menu\' ) {
                $link_text = "My Replaced Link Text";
                $link_url = "my-replaced-link-url.com";

                $items = str_replace( \'lang_placeholder_text\', $link_text, $items);
                $items = str_replace( \'lang_placeholder_url\', $link_url, $items);
        }

        return $items;
    }