{loop subcat(0,0,0,$siteid) $r}
{pc:content  action="lists" catid="$r[catid]" order="updatetime DESC" thumb="1" num="1" return="info"}
{loop $info $v}
 <?php 
  thumb($v[thumb],90,0);
  thumb($v[thumb],120,120);
  thumb($v[thumb],180,180);
  thumb($v[thumb],300,300);
 ?>
  {/loop}{/pc}{/loop}