首页循环栏目时，要循环的列表对应的广告时 可以这样
{loop $channels as $key=>$channel}
{if $key==0}
{/if}
{/loop}
{if $channel['key']==1}{z(1文字)}
{elseif $channel['key']==2}{z(2文字)}
{elseif $channel['key']==3}{z(3文字)}
{elseif $channel['key']==4}{z(4文字)}
{elseif $channel['key']==5}{z(5榜文字)}
{/if}
直接加到每个栏目的变量里面
s(文字,$channel['cid'])
这样更方便,不需要判断了
