我们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}
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