[e:loop={"select classname,classpath from [!db.pre!]enewsclass where bclassid=0 order by classid ",0,24,0}]
<li><a href="<?=$public_r[newsurl]?><?=$bqr[classpath]?>" rel="external nofollow" title="<?=$bqr[classname]?>"><?=$bqr[classname]?></a></li>
[/e:loop]如果是顶级栏目，bclassid就是0；如果是子栏目，bclassid就显示上级栏目ID号。
下面我们改造下，使其调用所有一级（顶级）栏目导航，导航支持外部栏目，支持后台设定是否显示：
[e:loop={'select classid,classname,classpath,wburl from [!db.pre!]enewsclass where bclassid=0 and showclass=0 order by myorder',0,24,0}]
<li><a href="<?php
if(empty($bqr[wburl]))
{
echo $public_r[newsurl].$bqr[classpath];
} else {
echo $bqr[wburl];
}
?>" title="<?=$bqr[classname]?>"><?=$bqr[classname]?></a></li>
[/e:loop]
