{loop table="article" notempty="litpic" jzcache="1" notempty="litpic" jzcachetime="60" orderby="addtime desc" isshow="1" limit="15" as="v"}
{php
//分3组
$n = $v_n%3;
$newlist[$n][]=$v;
/}
{/loop}
{foreach $newlist as $v}
{foreach $v as $s}
{/foreach}
{/foreach}