织梦导航菜单判断是否有子栏目，有则显示否则隐藏二级菜单调用

dedecms教程织梦教程导航菜单判断是否有子栏目，有则显示否则隐藏（二级菜单调用）！我们做织梦模版的时候，在调用二级菜单的时候，会遇到这样的问题，如果有子栏目，就显示二级菜单，如果没有就不显示。

下面给出代码：

{dede:channelartlist row=8 typeid='1,2,3,4,5'}
<li class="tab dropdown">
     <a href="{dede:field.typeurl/}" class="tablink arwlink" title="{dede:field.typename/}">{dede:field.typename/}</a>
     {dede:field name=typeid runphp="yes"}
     global $dsql; $sql = "SELECT id From `arctype` WHERE reid='@me' And ishidden<>1 order by sortrank asc limit 0, 100 ";
     $row = $dsql->GetOne($sql);
     @me=is_array($row)?'<ul class="subnav">':'';
     {/dede:field}
 
     {dede:channel type='son' noself='yes' }
         <a href="[field:typeurl/]">[field:typename/]</a>
     {/dede:channel}
     
     {dede:field name=typeid runphp="yes"}
     global $dsql; $sql = "SELECT id From `arctype` WHERE reid='@me' And ishidden<>1 order by sortrank asc limit 0, 100 ";
     $row = $dsql->GetOne($sql);
     @me=is_array($row)?'</ul>':'';
          {/dede:field}
</li>
{/dede:channelartlist}