将三级目录全部显示出来，而系统的channel标签只能获取下级分类，所以就报改了channel.lib.php这个文件，让他支持多级栏目嵌套，代码如下：

CAttribute->Items,$attlist);     extract($ctag->CAttribute->Items, EXTR_SKIP);     $innertext = $ctag->GetInnerText();     if(empty($typeid) && $envs['typeid']!=0)     {         $typeid = $envs['typeid'];         $reid = $envs['reid'];     }else{         $reid=0;     }     if($type==''||$type=='sun') $type="son";     if($innertext=='') $innertext = GetSysTemplets("channel_list.htm");     if($reid==0 && $typeid>0)     {         $dbrow = $dsql->GetOne("Select reid From net_arctype where id='$typeid' ");         if(is_array($dbrow)) $reid = $dbrow['reid'];     }     $likeType = '';     if($type=='top')     {         $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description           From net_arctype where reid=0 And ishidden<>1 order by sortrank asc limit 0,$row";     }     else if($type=="son")     {         //if($_sys_globals['typeid']>0) $typeid = $_sys_globals['typeid'];         if($typeid==0) {             return '';         }         $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description           From net_arctype where reid='$typeid' And ishidden<>1 order by sortrank asc limit 0,$row";     }     else if($type=="self")     {         if($reid==0) {             return '';         }         $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description             From `net_arctype` where reid='$reid' And ishidden<>1 order by sortrank asc limit 0,$row";     }     //And id<>'$typeid'     $dtp2 = new DedeTagParse();     $dtp2->SetNameSpace("field","[","]");     $dtp2->LoadSource($innertext);     $dsql2 = clone $dsql;     $dsql->SetQuery($sql);     $dsql->Execute();     $line = $row;     $GLOBALS['autoindex'] = 0;     for($i=0;$i < $line;$i++)     {         if($col>1) $likeType .= "

\r\n";         for($j=0;$j<$col;$j++)         {             if($col>1) $likeType .= "

\r\n";             if($row=$dsql->GetArray())             {                 if($type=='self' && $row['id']==$typeid) //处理同级栏目中，当前栏目的样式                 {                     if($currentstyle!='')                     {                         $linkOkstr = $currentstyle;                         $row['typelink'] = GetOneTypeUrlA($row);                         $linkOkstr = str_replace("~typelink~",$row['typelink'],$linkOkstr);                         $linkOkstr = str_replace("~typename~",$row['typename'],$linkOkstr);                         $likeType .= $linkOkstr;                     }                 }else                 {                     $row['typelink'] = $row['typeurl'] = GetOneTypeUrlA($row);                     if(is_array($dtp2->CTags))                     {                         foreach($dtp2->CTags as $tagid=>$ctag){                             if(isset($row[$ctag->GetName()]))                             {                                 $dtp2->Assign($tagid,$row[$ctag->GetName()]);                             }                             elseif (preg_match('/^sonchannel[0-9]*$/',$ctag->GetName()))                             {                                 $dtp2->Assign($tagid,lib_channel_son($ctag,$row['id'],$dsql2));                             }                         }                     }                     $likeType .= $dtp2->GetResult();                 }             }             if($col>1) $likeType .= "

\r\n";             $GLOBALS['autoindex']++;         }//Loop Col         if($col>1)         {             $i += $col - 1;             $likeType .= "    

\r\n";         }     }//Loop for $i     reset($dsql2);     $dsql->FreeResult();     return $likeType; } function lib_channel_son($ctag,$typeid = 0,$dsql2) {     $attlist = "row|100,col|1,currentstyle|";     FillAttsDefault($ctag->CAttribute->Items,$attlist);     extract($ctag->CAttribute->Items, EXTR_SKIP);     $innertext = $ctag->GetInnerText();     $dsql3 = clone $dsql2;     $likeType = '';     //if($_sys_globals['typeid']>0) $typeid = $_sys_globals['typeid'];     if($typeid==0) {         return '';     }     $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description           From net_arctype where reid='$typeid' And ishidden<>1 order by sortrank asc limit 0,$row";     //And id<>'$typeid'     $dtp2 = new DedeTagParse();     $dtp2->SetNameSpace("field","[","]");     $dtp2->LoadSource($innertext);     $dsql2->SetQuery($sql);     $dsql2->Execute();     $line = $row;     for($i=0;$i < $line;$i++)     {         if($col>1) $likeType .= "

\r\n";         for($j=0;$j<$col;$j++)         {             if($col>1) $likeType .= "

\r\n";             if($row=$dsql2->GetArray())             {                 $row['typelink'] = $row['typeurl'] = GetOneTypeUrlA($row);                 if(is_array($dtp2->CTags))                 {                     foreach($dtp2->CTags as $tagid=>$ctag){                         if(isset($row[$ctag->GetName()]))                         {                             $dtp2->Assign($tagid,$row[$ctag->GetName()]);                         }                         elseif (preg_match('/^sonchannel[0-9]*$/',$ctag->GetName()))                         {                             $dtp2->Assign($tagid,lib_channel_son($ctag,$row['id'],$dsql3));                         }                     }                 }                 $likeType .= $dtp2->GetResult();             }             if($col>1) $likeType .= "

\r\n";         }//Loop Col  www.lol9.cn         if($col>1)         {             $i += $col - 1;             $likeType .= "    

\r\n";         }     }//Loop for $i     reset($dsql3);     $dsql2->FreeResult();     return $likeType; } ?>

将以上代码全部替换channel.lib.php文件内容后就可以了，附前端调用的示例：

{dede:channel type='top'} [field:typename/]

[field:sonchannel0]
• [field:typename/]
[field:sonchannel1]
• ---[field:typename/]
[field:sonchannel2]
• ===[field:typename/]
[field:sonchannel3]
• ===[field:typename/]
[/field:sonchannel3] [/field:sonchannel2] [/field:sonchannel1] [/field:sonchannel0]

{/dede:channel}