定义一个function
{function name=menu level=0}
<ul class="level{$level}">
{foreach $data as $entry}
{if is_array($entry)}
<li>{$entry@key}</li>
{call name=menu data=$entry level=$level+1}
{else}
<li>{$entry}</li>
{/if}
{/foreach}
</ul>
{/function} 创建一个测试数组
{$menu = ['item1','item2','item3' => ['item3-1','item3-2','item3-3' =>
['item3-3-1','item3-3-2']],'item4']} 运行call
{call name=menu data=$menu}
{call menu data=$menu} {* short-hand *}
输出
* item1
* item2
* item3
o item3-1
o item3-2
o item3-3
+ item3-3-1
+ item3-3-2
* item4