帝国导航调用高级php代码

帝国cms导航代码：
<li class="<?=$GLOBALS[navclassid]?"":"current-menu-item"?>"><a href="[!--news.url--]">首页</a></li>
<?php
$sql=$empire->query("select classid,sonclass,classname,islast,islist from {$dbtbpre}enewsclass where bclassid=0 and showclass=0 order by myorder,myorder asc");
while($s=$empire->fetch($sql)){
$classurl=sys_ReturnBqClassname($s,9); 
$tclass="";
$fr=explode('|',$class_r[$GLOBALS[navclassid]][featherclass]);
$topbclassid=$fr[1]?$fr[1]:$GLOBALS[navclassid];
if($topbclassid==$s[classid]){
$tclass='current-menu-item';
}
echo '<li class="'.$tclass.'" ><a href="'.$classurl.'">'.$s[classname].'</a>';
if($s[islast]==0){
$sql2=$empire->query("select classid,classname from {$dbtbpre}enewsclass where bclassid=$s[classid] and showclass=0 order by myorder,myorder asc");
$str="";
while($s2=$empire->fetch($sql2)){
$classurl2=sys_ReturnBqClassname($s2,9); 
$str.='<li><a href="'.$classurl2.'">'.$s2[classname].'</a></li>';
}
echo '<ul class="sub-menu">'.$str.'</ul>';
}
echo '</li>';
}
?>