PbootCMS内页子栏目当前栏目如何实现高亮显示

{pboot:nav num=10 parent={sort:tcode}}
{pboot:if('[nav:scode]'=='{sort:scode}')}
<span class="active">[nav:name]</span>
{else}
[nav:name]
{/pboot:if}
{/pboot:nav}