ThinkCMF5.1导航菜单自定义调用，解决复杂导航实现，特别是导航标签难以实现的情况。
navMenusTreeArray('导航ID')实例：
<php>
$navMenuModel = new \app\admin\model\NavMenuModel();
$menus = $navMenuModel->navMenusTreeArray('1');
</php>
<volist name="menus" id="vo">
<a href="{$vo['href']}" target="{$vo['target']}">{$vo['name']}</a>
</volist>subNavMenusTreeArray()为生成前台导航的子导航。综合实例（自定义三级导航）：
<ul>
<php>
$navMenuModel = new \app\admin\model\NavMenuModel();
$menus = $navMenuModel->navMenusTreeArray('1');
</php>
<volist name="menus" id="vo">
<php>
$submenus = $navMenuModel->subNavMenusTreeArray($vo['id']);
</php>
<li>
<a href="{$vo['href']}" target="{$vo['target']}" class="nav-title">{$vo['name']}</a>
<dl>
<div class="duoji-nav">
<volist name="submenus" id="subvo">
<dd>
<ul>
<li style="color:blue !important; font-size: 18px !important;">
{$subvo.name}
</li>
<php>
$submenus2 = $navMenuModel->subNavMenusTreeArray($subvo['id']);
</php>
<volist name="submenus2" id="subvo2">
<li>
<a href="{$subvo2['href']}">{$subvo2.name}</a>
</li>
</volist>
</ul>
</dd>
</volist>
</div>
</dl>
</li>
</volist>
</ul>