导航代码

<ul class="menulist">
<li><a {if !isset($catid)} class="current" {/if} href="{SITE_URL}">首页</a></li>
{w:nav field="catid,catname,arrchildid,pclink,type,target" where="parentid=0" limit="20" cache="3600"}
{loop $data $v}
<li>
<a {if isset($catid) && in_array($catid, explode(',', $v['arrchildid']))} class="current" {/if} href="{$v[pclink]}" target="{$v[target]}">{$v[catname]}</a>
{if is_childid($v)}
{php $r = get_childcat($v['catid']);}
<ul class="sub_nav">
{loop $r $v}
<li><a href="{$v[pclink]}" target="{$v[target]}">{$v[catname]}</a></li>
{/loop}
</ul>
{/if}
</li>
{/loop}
</ul>