dedecms怎么自动给已经发布过的文章中的关键词加超链接

foreach($kws as $k) 
{ 
$k = trim($k); 
if($k!=”") 
{ 
if($i > $maxkey) 
{ 
break; 
} 
$myrow = $this->dsql->GetOne(“select * from dede_keywords where keyword=’$k’ And rpurl<>” “); 
if(is_array($myrow)) 
{ 
$karr[] = $k; 
$GLOBALS['replaced'][$k] = 0; 
$kaarr[] = “<a href=’{$myrow['rpurl']}’><u>$k</u></a>”; 
} 
$i++; 
} 
}