二級分類的數據表結構如下：

復制代碼代碼如下:

PHP代碼如下 
/** 
@ 文章分類 含二級分類 
@ param int $rootnum -- 一級分類數量 
@ param int $childnum -- 二級分類數量 
@ 返回值 array 
@ date 2011.2.24 
*/ 
function temp_articletreecate($rootnum,$childnum){ 
if(!isnumber($rootnum)){ 
$rootnum = 10; 
} 
if(!isnumber($childnum)){ 
$childnum = 10; 
} 
$category = array(); 
$parent_sql = "SELECT cateid,catename FROM ".TABLE_PREFIX."articlecate WHERE parentid=0 AND depth=0 AND flag=1 ORDER BY orders ASC"; 
if(intval($rootnum)>0){ 
$parent_sql.=" LIMIT $rootnum"; 
} 
$parent_cate = $GLOBALS['db']->getall($parent_sql); 
foreach($parent_cate as $parent_key => $parent_value){ 
//子類數組名為 childcategory 根據情況自定義名稱 
$category[] = array('cateid'=>$parent_value['cateid'],'catename'=>$parent_value['catename'],'childcategory'=>array()); 


//讀取子類 
$child_sql = "SELECT cateid,catename FROM ".TABLE_PREFIX."articlecate WHERE parentid=".$parent_value['cateid']." AND flag=1 ORDER BY orders ASC"; 
if(intval($childnum)>0){ 
$child_sql.=" LIMIT $childnum"; 
} 
$child_cate = $GLOBALS['db']->getall($child_sql); 
foreach($child_cate as $child_key => $child_value){ 
$category[count($category)-1]['childcategory'][] = array('cateid'=>$child_value['cateid'],'catename'=>$child_value['catename']); 
} 
} 
return $category; 
} 

PHP頁面調用分類，如index.php 
$goodscatetree = array(); 
$goodscatetree = temp_goodstreecate(4,0); //調用分類函數（含二級分類）4--表示一級分類只顯示4個，0--表示二級分類不限數量 
$tpl>assign("goodscatetree",$goodscatetree); //執行smarty引擎 
$tpl->display->(index.tpl); //輸出smarty模版頁面 


TPL模版頁面輸出分類，如index.tpl頁面 
{section name=p loop=$goodscatetree} 
一級分類：{$goodscatetree[p].catename} 
{section name=c loop=$goodscatetree[p].childcategory} 
二級分類：{$goodscatetree[p].childcategory[c].catename} 
{/section} 
{/section}