preg_replace function problem

[eluser]basty_dread[/eluser]
hi
i try to modify your code this way:

Code:

$find = "web design";
    $string = "WEB DESIGN Web Design web design <a href='yahoo.com'>web design google</a> las vegas";
$finalstring = preg_replace('/([<a[^>]*>].*?('.$find.')+?.*?[^<\/a>]\b)/iU', '<a href="http://google.com">\1</a>', $string,-1,$i);

echo $finalstring;
echo '<br />'.$i;

it exclude the one with link but the other word that should be replaced with a new link was left untouched..
my aim is that it it will leave the word with link and put a link on the other word..