function get_com($catid){
	global $db;
	$sql = "select * from ".$db->pre."category where catid=".$catid.""; //调用当前栏目所有子分类
	$result = mysql_query($sql);
	$catids = '';
	while($count=mysql_fetch_array($result)) {
		$catids .= $count['arrchildid'];
	}
	$row = array();
	$sql2 = "select a.username,a.userid,a.company, COUNT(b.itemid) AS com_num from ".$db->pre."member as a,".$db->pre."mall as b where a.username=b.username and b.catid in ($catids) GROUP BY b.username HAVINg com_num > 0 ";
	$result2 = mysql_query($sql2);
	while($count2 = mysql_fetch_array($result2)) {
		$row[] = $count2;
	}
	return $row;
}

{php $cominfo=get_com($c[catid]);}
{loop $cominfo $i $t}
<a rel="nofollow" title="{$t[company]}" target="_blank" href="{userurl($t[username])}"><span>{$t[company]}</span></a>
{/loop}