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經常會遇到需要調用多個指定的頂級欄目導航，那我們如何實現呢？關于DEDECMS實現嵌套獲取欄目及其子欄目列表的問題，在論壇找到了以前版本的修改方法，于是修改了一下，現在分享給大家。請看實例代碼：

修改文件：\include\taglib目錄下的channel.lib.php，請將以下代碼全部復制替換上述文件。

以下為引用的內容：

<?php function lib_channel(&$ctag,&$refObj) {     global $_sys_globals,$envs,$dsql;     $attlist = "typeid|0,reid|0,row|100,col|1,type|son,currentstyle|";     FillAttsDefault($ctag->CAttribute->Items,$attlist);     extract($ctag->CAttribute->Items, EXTR_SKIP);     $innertext = $ctag->GetInnerText();         $cacheid = trim($cacheid);     if($cacheid !='') {         $likeType = GetCacheBlock($cacheid);         if($likeType != '') return $likeType;     }     $reid = 0;     $topid = 0;     if(empty($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 = $dsql->GetOne("Select reid From dede_arctype where id='$typeid' ");         if(is_array($dbrow)) $reid = $dbrow['reid'];     }     $likeType = '';     if($type=='top')     {         $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description           From dede_arctype where reid=0 And ishidden<>1 order by sortrank asc limit 0,$row";     }     else if($type=="son")     {         //if($_sys_globals['typeid']>0) $typeid = $_sys_globals['typeid'];         if($typeid==0) {             return '';         }         $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description           From dede_arctype where reid='$typeid' And ishidden<>1 order by sortrank asc limit 0,$row";     }     else if($type=="self")     {         if($reid==0) {             return '';         }         $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description             From `dede_arctype` where reid='$reid' And ishidden<>1 order by sortrank asc limit 0,$row";     }     //And id<>'$typeid'     $needRel = false;     $dtp2 = new DedeTagParse();     $dtp2->SetNameSpace("field","[","]");     $dtp2->LoadSource($innertext);     $dsql2 = clone $dsql;     $dsql->SetQuery($sql);     $dsql->Execute();     $line = $row;         //檢查是否有子欄目，并返回rel提示（用于二級菜單）     if(ereg(':rel', $innertext)) $needRel = true;         if(empty($sql)) return '';     $dsql->SetQuery($sql);     $dsql->Execute();         $totalRow = $dsql->GetTotalRow();     $GLOBALS['autoindex'] = 0;     for($i=0;$i < $line;$i++)     {         if($col>1) $likeType .= "<dl>\r\n";         for($j=0;$j<$col;$j++)         {             if($col>1) $likeType .= "<dd>\r\n";   織夢模板免費          if($row=$dsql->GetArray())             {                             $row['sonids'] = $row['rel'] = '';                 if($needRel)                 {                     $row['sonids'] = GetSonIds($row['id'], 0, false);                     if($row['sonids']=='') $row['rel'] = '';                     else $row['rel'] = " rel='dropmenu{$row['id']}'";                 }                 //處理同級欄目中，當前欄目的樣式                 if( ($row['id']==$typeid || ($topid==$row['id'] && $type=='top') ) && $currentstyle!='' )                 {                     if($currentstyle!='')                     {                     $linkOkstr = $currentstyle;                     $row['typelink'] = GetOneTypeUrlA($row);                     $linkOkstr = str_replace("~rel~",$row['rel'],$linkOkstr);                     $linkOkstr = str_replace("~id~",$row['id'],$linkOkstr);                     $linkOkstr = str_replace("~typelink~",$row['typelink'],$linkOkstr);                     $linkOkstr = str_replace("~typename~",$row['typename'],$linkOkstr);                     $likeType .= $linkOkstr;                     }                 }else                 {                     $row['typelink'] = $row['typeurl'] = GetOneTypeUrlA($row);                     if(is_array($dtp2->CTags))                     {                        dede模板免費; foreach($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 .= "</dd>\r\n";             $GLOBALS['autoindex']++;         }//Loop Col         if($col>1)         {          夢織模板   $i += $col - 1;             $likeType .= "    </dl>\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 '';     }     $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description           From dede_arctype where reid='$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) $likeType .= "<dl>\r\n";         for($j=0;$j<$col;$j++)         {             if($col>1) $likeType .= "<dd>\r\n";             if($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) $likeType .= "</dd>\r\n";         }//Loop Col         if($col>1)         {             $i += $col - 1;             $likeType .= "    </dl>\r\n";         }     }//Loop for $i     reset($dsql3);     $dsql2->FreeResult();     return $likeType; } ?>

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