两个foreach 如何循环

<div class="louceng"><br /> <?php if(!empty($output['class_list']) && is_array($output['class_list'])){<br />	 $i = 0;<br />	 ?><br /><br />    <br />      <?php foreach($output['class_list'] as $k=>$v){<br />		  <br />		  $i++;<br />		  ?><br />         <div class="floor_area"> <br />	      <?php if ($_GET['cate_id'] == $v['sc_parent_id']){<br />			  ?><br />	      <h2><?php echo $i;?>F  <?php echo $v['sc_name'];?></h2><br />             <?php if(!empty($output['store_list']) && is_array($output['store_list'])){?><br />             <ul><br />             <?php foreach($output['store_list'] as $skey => $store){?><br />             <br />             <li><a href="<?php echo ncUrl(array('act'=>'show_store','id'=>$store['store_id']),'store',$store['store_domain']);?>" title="" target="_blank"><span class="thumb size72"><br />             @@##@@" onload="javascript:DrawImage(this,240,240);" /></span></a><br />             </li><br />             <br />             <?php }?><br />             </ul><br />             <div class="clear"></div><br />             <?php }?><br />	      <?php }elseif (!isset($v['child']) && $output['class_list'][$_GET['cate_id']]['sc_parent_id'] == $v['sc_parent_id']){?><br />	      <h2><?php echo $v['sc_name'];?></h2><br />	      <?php }?><br />        </div><br />      <?php }?><br />    <br />  <?php }?><br /></div>