pbootcms栏目三级分类循环与判断，更多级别也可以。

大概 代码。是这样的。

{pboot:nav num=10 parent=0}

 {pboot:if([nav:soncount]>0)}menu-item-has-children{/pboot:if} 

   {pboot:2nav parent=[nav:scode]}

   {pboot:if([2nav:soncount]>0)}menu-item-has-children{/pboot:if} 

  {pboot:3nav parent=[nav:scode]}

   {pboot:if([3nav:soncount]>0)}menu-item-has-children{/pboot:if} 

    {/pboot:3nav}

    {/pboot:2nav}

{/pboot:nav}

实例： 

{pboot:nav num=10 parent=0}

<li class="menu-item menu-item-type-post_type menu-item-object-page {pboot:if('[nav:scode]'=='{sort:tcode}')} current-menu-item page_item current_page_item{/pboot:if}   {pboot:if([nav:soncount]>0)}menu-item-has-children{/pboot:if} w-nav-item level_1">

  <a class="w-nav-anchor level_1" href="[nav:link]">

  <span class="w-nav-title">[nav:name]</span>

  <span class="w-nav-arrow"></span>

  </a>

  <ul class="w-nav-list level_2">

    {pboot:2nav parent=[nav:scode]}

    <li class="menu-item menu-item-type-taxonomy menu-item-object-category {pboot:if([2nav:soncount]>0)}menu-item-has-children{/pboot:if} w-nav-item level_2 menu-item-62">

      <a class="w-nav-anchor level_2" href="[2nav:link]">

      <span class="w-nav-title">[2nav:name]</span>

      <span class="w-nav-arrow"></span>

       </a>

    <ul class="w-nav-list level_3">      

      {pboot:3nav parent=[2nav:scode]}

        <li class="menu-item menu-item-type-taxonomy menu-item-object-category w-nav-item level_2 menu-item-62">

     <a class="w-nav-anchor level_2" href="[3nav:link]">

     <span class="w-nav-title">[3nav:name]</span>

     <span class="w-nav-arrow"></span>

      </a>

       </li>

      {/pboot:3nav}

     </ul>

    </li>

    {/pboot:2nav}

        </ul>

</li>

{/pboot:nav}