{loop $data $t}                     {if $t[id]==''}                     <span>查无此产品</span>                     {else}                         <div style="width:350px;margin:0 auto;">                             <a href="{$t[url]}">产品名称：{$t[title]}</a>                             <br>                             <a href="{$t[url]}">产品图片<img src="{$t[thumb]}" alt=""></a>                         </div>                         <br>                     {/if}                 {/loop}        $data 是一个二维数组