dede织梦在任意页面获取多级栏目列表的方法

//在任意页面获取某顶级栏目下的二级栏目列表 用于channel标记　$typeid为顶级栏目ID
function getProductClass($typeid)
{
$linkList = "";
$dsql = new DedeSql(false);
$dsql->SetQuery("select typedir,typename from dede_arctype where reID = ‘$typeid’ order by sortrank");
$dsql->Execute();
while($row=$dsql->GetObject())
{
$typelink = GetTypeUrl($row->ID,MfTypedir($row->typedir),$row->isdefault,$row->defaultname,$row->ispart,$row->namerule2);
$linkList .= "<li>·<a href="$typelink">".$row->typename."</a></li>n   ";
}
$dsql->Close();
return $linkList;
}

{dede:channel function=’getProductClass(2)’}{/dede:channel}