Please, help me sort out these arrays

[GoodWill]

I have this function to extract links and their descriptions

function extract_links($string) { 
    preg_match_all("/(href[=  = ])(.*?)(>)(.*?)(<\/a>+)/i",$string, $matches); 
    for($i=0; $i<count($matches); $i++) { 
	    if($i == 2) { 
            for($x=0; $x<count($matches[$i]); $x++) { 
                  $return['url'][$x]  = eregi_replace("^\"|\"$","",$matches[$i][$x]); 
            } 
        } 
        if($i == 4) { 
            for($x=0; $x<count($matches[$i]); $x++) { 
                $return['link_text'][$x]  = $matches[$i][$x]; 
            } 
        } 
	}
	if(is_array($return)) { 
        return $return; 
    } else { 
        return FALSE; 
    } 
} 

$links  = extract_links($html)

this function return arrays:

$links[link_text][$i]
$links[url][$i]

I have this search/delete function to delete values from array, which contain specific word

function array_delete($array, $filterfor){
$thisarray = array ();
 foreach($array as $value)
  if(stristr($value, $filterfor)===false && strlen($value)>0)
   $thisarray[] = $value;
 return $thisarray;
}
$links['url']=array_delete($links['url'], "someword");

So I know, how to delete value from each array separately, but when I delete url from one array, there is still description in the second array and obversely.

Please, help me to find way, how to delete both related entries together

GoodWill