$pv->Fields['typeurl'] = GetOneTypeUrlA($typeids[$i]);

//讓channelarclist支持currentstyle屬性
        if($typeids[$i]['id'] == $refObj->TypeLink->TypeInfos['id'] || $typeids[$i]['id'] == $refObj->TypeLink->TypeInfos['topid'] ){  
             $pv->Fields['currentstyle'] = $currentstyle ? $currentstyle : 'nLi on';  
         }  
         else{  
             $pv->Fields['currentstyle'] = 'nLi';  
         }  
//讓channelarclist支持currentstyle屬性end

{dede:channelartlist typeid='2' currentstyle='current'}

<li class='{dede:field.currentstyle/}'><a href='{dede:field name='typeurl'/}'>{dede:field name='typename'/}</a></li>

。。。

{/dede:channelartlist}