Pbootcms一级栏目下的二级三级栏目高亮

{pboot:nav parent={sort:tcode}}
<li> 
  <span><a href="[nav:link]" rel="nofollow">[nav:name]</a></span>
  <dl>
    {pboot:2nav parent=[nav:scode]}
    <dt {pboot:if('[2nav:scode]'=='{sort:scode}')}class="active"{/pboot:if}><a href="[2nav:link]" class="san">- [2nav:name]</a></dt>
    {/pboot:2nav}
  </dl>
</li>
{/pboot:nav}

高亮运用到的代码就是这串：

{pboot:if('[2nav:scode]'=='{sort:scode}')}class="active"{/pboot:if}