实现代码如下：

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{loop subcat(
$catid
) 
$c
}
    
{
if 
$c
[
'child'
]}
    
{php 
$child 
= subcat(
$c
[
'catid'
]);}  
    
<div 
class
=
"wj_fenlei"
>
        
<div 
class
=
"fenlei_pic"
>
            
<em><img src=
"{php echo $c['image'];}" 
width=
"298" 
height=
"144" 
alt=
"" 
/></em>
            
<div 
class
=
"xmtit"
>{php 
echo 
$c
[
'catname'
];}+</div>
            
<div 
class
=
"xian"
>
                
<span>{php 
echo 
"<a href='"
.
$c
['url
']."' 
target=
'_blank'
>".
$c
[
'catname'
].
"</a>"
;}</span>
                
<div 
class
=
"xm_a"
>
                    
{loop 
$child 
$catc
}
                        
{php 
$subcatid
[] = 
$catc
[
'catid'
];}
                        
{php 
echo 
"<a href='"
.
$catc
['url
']."' 
target=
'_blank'
>".
$catc
[
'catname'
].
"</a>"
;}
                    
{/loop}
                
</div>
            
</div>
        
</div>
        
<ul>     
{php 
$subcatid  
= implode(
','
, 
$subcatid
);}
{php 
$arr
=
explode
(
','
,
$subcatid
);}
{pc:get sql=
"SELECT * from v9_news where status=99 and catid in ($subcatid) order by id DESC LIMIT 0,4--" 
num=
"6" 
return
=
"data"
}
    
{loop 
$data 
$r
}
             
<li> <a href=
"{$r[url]}" 
target=
"_blank" 
title=
"{$r['title']}"
>● [{
$CATEGORYS
[
$r
[catid]][catname]}] {str_cut(
$r
[
'title'
],40)}</a></li>  
    
{/loop}
{/pc}
        
</ul>
        
<div 
class
=
"zs_more"
>
        
{php 
echo 
"<a href='"
.
$c
['url
']."' 
target=
'_blank'
>我想了解更多".
$c
[
'catname'
].
"知识</a>"
;}
        
</div>       
    
</div>
    
{php 
$subcatid 
= null;}
   
{/
if
}
{/loop}