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用了一二级循环，想写个判断
如果顶级栏目是5的时候，不循环下面的二级栏目
{category module=share pid=0}
<div class="column">
<h2><a href="{$t.url}">{$t.name}</a></h2>
<div class="nav_b">
{category module=share pid=$t.id return=t2}
<a href="{$t2.url}" target="_blank">{$t2.name}</a>
{/category}
</div>
</div>
{/category}
{category module=share pid=0}
<div class="column">
<h2><a href="{$t.url}">{$t.name}</a></h2>
<div class="nav_b">
{category module=share pid=$t.id return=t2}
<a href="{$t2.url}" target="_blank">{$t2.name}</a>
{/category}
</div>
</div>
{/category}
{category module=share pid=0} <div class="column"> <h2><a href="{$t.url}">{$t.name}</a></h2> {if $t.id != 5} <div class="nav_b"> {category module=share pid=$t.id return=t2} <a href="{$t2.url}" target="_blank">{$t2.name}</a> {/category} </div> {/if} </div> {/category}