关于Smarty if判断问题

Question

<ul id="menu"> {$items = $CMS->Tags_cate("lanmu_id=1 & cate_id=0")} {foreach $items as $row $product} <li{if $row.id==1} class="active" {/if}> <a href="{ROOT}/product/index-{$row.id}.html"> {$row.title} </a> {if count($items) > 0} <ul class="sidebar-nav-2"> {$items2 = $CMS->Tags_cate("lanmu_id=1 & cate_id={$row.id}")} {foreach $items2 as $row2} <li> <a href="{ROOT}/product/index-{$row2.id}.html"> {$row2.title} </a> {if count($items2)>0} <ul class="sidebar-nav-3"> {$items3 = $CMS->Tags_cate("lanmu_id=1 & cate_id={$row2.id}")} {foreach $items3 as $row3} <li> <a href="{ROOT}/product/index-{$row3.id}.html"> {$row3.title} </a> </li> {/foreach} </ul> {/if} </li> {/foreach} </ul> {/if} </li> {/foreach} </ul> 我这里的{if count($items) > 0}判断没效果，我要判断当没有下级内容是隐藏ul，这里的条件不知道要怎么写才行？

Answer 1

{if count($items) gt 0}

Answer 2

$smarty.foreach.name.iteration

Answer 3

{foreach $arrayvar as $keyvar=>$itemvar}
 {foreach $items as $row $product} //这个写法？？
...
{if count($items) > 0}   //在foreach内部判断$items? 值为空就不进入循环了
...

{/foreach}