官方写的太烂了，本来想自己写呢，碍于时间的问题，将来再写！
```
<div id="nav-wrapper">
<ul class="nav nav-list">
{:getsubmenu($submenus)}
</ul>
</div>
```
模板遍历
```
<php>$submenus=$menus;</php>
<php>function getsubmenu($submenus){</php>
<notempty name="submenus">
<php>foreach($submenus as $menu){</php>
<li>
<php>
$menu_name=lang($menu['lang']);
$menu_name=$menu['lang']==$menu_name?$menu['name']:$menu_name;
</php>
<php>if(empty($menu['items'])){</php>
<a href="javascript:openapp('{$menu.url}','{$menu.id}','{$menu_name}',true);">
<i class="fa fa-{$menu.icon|default='desktop'}"></i>
<span class="menu-text"> {$menu_name} </span>
</a>
<php>}else{</php>
<a href="#" class="dropdown-toggle">
<i class="fa fa-{$menu.icon|default='desktop'} normal"></i>
<span class="menu-text normal"> {$menu_name} </span>
<b class="arrow fa fa-angle-right normal"></b>
<i class="fa fa-reply back"></i>
<span class="menu-text back">返回</span>
</a>
<ul class="submenu">
<php>getsubmenu1($menu['items'])</php>
</ul>
<php>}</php>
</li>
<php>}</php>
</notempty>
<php>}</php>
<php>function getsubmenu1($submenus){</php>
<php>foreach($submenus as $menu){</php>
<li>
<php>
$menu_name=lang($menu['lang']);
$menu_name=$menu['lang']==$menu_name?$menu['name']:$menu_name;
</php>
<php>if(empty($menu['items'])){</php>
<a href="javascript:openapp('{$menu.url}','{$menu.id}','{$menu_name}',true);">
<i class="fa fa-caret-right"></i>
<span class="menu-text">
{$menu_name}
</span>
</a>
<php>}else{</php>
<a href="#" class="dropdown-toggle">
<i class="fa fa-caret-right"></i>
<span class="menu-text">
{$menu_name}
</span>
<b class="arrow fa fa-angle-right"></b>
</a>
<ul class="submenu">
<php>getsubmenu2($menu['items'])</php>
</ul>
<php>}</php>
</li>
<php>}</php>
<php>}</php>
<php>function getsubmenu2($submenus){</php>
<php>foreach($submenus as $menu){</php>
<li>
<php>
$menu_name=lang($menu['lang']);
$menu_name=$menu['lang']==$menu_name?$menu['name']:$menu_name;
</php>
<a href="javascript:openapp('{$menu.url}','{$menu.id}','{$menu_name}',true);">
<i class="fa fa-angle-double-right"></i>
<span class="menu-text">
{$menu_name}
</span>
</a>
</li>
<php>}</php>
<php>}</php>
```
