sub-submenu walker method

Question

我有一个沃克班申请我的子菜单，但我如何获得子子项目到这个代码？下面

是我的代码

的functions.php

<?php  
class wp_submenu_class extends Walker_nav_menu {  
    function start_lvl(&$output, $depth) {  
    $indent = str_repeat("\t", $depth);  
    $output .= "\n$indent<ul class=\"submenu\">\n";  
    }  
} 
?> 

的header.php

<div class="navi"> 
<?php wp_nav_menu(array( 
    'menuitems' => 'mymenu',  
    'container'  => '',  
    'container_id' => '',  
    'menu_class'  => 'topmenu',  
    'menu_id'   => '',  
    'items_wrap'  => '<ul id="" class="%2$s">%3$s</ul>',  
    'walker' => new wp_submenu_class()));  
?>  
</div> 

Answer 1

你没有指定类的end_lvl。

<?php wp_nav_menu(array( 
         'menu' => 'Menu 1', // REPLACE NAME WITH YOUR MENU 
         'container_class' => 'menu-header', 
         'menu_class' => 'nav-menu', 
         'depth'=> 3, // CHANGE THE VALUE WHICH LAVEL YOU CAN DISPLAY. 
         'menuitems' => 'mymenu',  
         'container'  => '',  
         'container_id' => '',  
         'menu_class'  => 'menu-header', // MENU CLASS 
         'menu_id'   => '',  
         'items_wrap'  => '<ul id="" class="%2$s">%3$s</ul>',  
         'walker' => new wp_submenu_class() //function 
         ));  
?> 

class wp_submenu_class extends Walker_Nav_Menu { 
    function start_lvl(&$output, $depth) { 
    $indent = str_repeat("\t", $depth); 
    $output .= "\n$indent<ul class=\"submenu\">\n"; 
    } 
    function end_lvl(&$output, $depth) { 
    $indent = str_repeat("\t", $depth); 
    $output .= "$indent</ul>\n"; 
    } 
}