我正在尝试使用walker类向wordpress中的描述和子菜单添加包装，描述将仅显示第一个菜单，因此结构如下所示

EDIT

我已经能够将包装div添加到描述中，但不能同时添加到子菜单和菜单描述中，因此我正在寻求帮助，以便将包装div添加到菜单描述和子菜单（如果有）

<ul id="menu-main-menu" class="primary-nav">
    <li id="menu-item-41" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children first">
        <a href="http://link" class="menu-image-title-after menu-image-not-hovered">Menu 1</a>
        <div class=\'MainMenuWrapper\'> <!--   NEW WRAPPER STARTS  --->
            <ul class="nav_desc"><li class="first"><img src="http://link/arrow.png"></li><li class="last">Menu description Goes here.</li></ul>
            <ul class="sub-menu">
            <li id="menu-item-44" class="menu-item menu-item-type-post_type menu-item-object-page first"><a href="http://link" class="menu-image-title-after menu-image-not-hovered"><img width="84" height="46" src="http://link/sub_menu_bg1.png" class="menu-image menu-image-title-after" alt="Image Kitchen">Kitchen</a></li>
            </ul>
        </div>    <!--   NEW WRAPPER ENDS  --->
    </li>
</ul>

这是我当前使用的代码

class Description_Walker extends Walker_Nav_Menu
{
public function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 )
    {
        $classes     = empty ( $item->classes ) ? array () : (array) $item->classes;

        $class_names = join(
            \' \'
        ,   apply_filters(
                \'nav_menu_css_class\'
            ,   array_filter( $classes ), $item
            )
        );

        ! empty ( $class_names )
            and $class_names = \' class="\'. esc_attr( $class_names ) . \'"\';

        $output .= "<li id=\'menu-item-$item->ID\' $class_names>";

        $attributes  = \'\';

        ! empty( $item->attr_title )
            and $attributes .= \' title="\'  . esc_attr( $item->attr_title ) .\'"\';
        ! empty( $item->target )
            and $attributes .= \' target="\' . esc_attr( $item->target     ) .\'"\';
        ! empty( $item->xfn )
            and $attributes .= \' rel="\'    . esc_attr( $item->xfn        ) .\'"\';
        ! empty( $item->url )
            and $attributes .= \' href="\'   . esc_attr( $item->url        ) .\'"\';

        // insert description for top level elements only
        // you may change this

        $description = ( ! empty ( $item->description ) and 0==$depth  )
            ? \'<ul class="nav_desc"><li><img src="\'.get_bloginfo( \'template_url\' ).\'/images/arrow.png"></li><li>\' . esc_attr( $item->description ) . \'</li></ul>\' : \'\';

            // $description = ( ! empty ( $item->description )  )
            // ? \'<span class="nav_desc">\' . esc_attr( $item->description ) . \'</span>\' : \'\';

        $title = apply_filters( \'the_title\', $item->title, $item->ID );

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

        // Since $output is called by reference we don\'t need to return anything.
        $output .= apply_filters(
            \'walker_nav_menu_start_el\'
        ,   $item_output
        ,   $item
        ,   $depth
        ,   $args
        );
    }
}

jQuery(\'.menu-item-has-children\').each(function(){
    idLi=jQuery(this).attr(\'id\');
    jQuery(\'#\'+idLi+\' ul\').wrapAll(\'<div class="slideFromtop">\')
});