VB5 hide links from guests , parsedText regex

[ViR-EnG]

Hi friends .
I try to hide links from guests , but I don't find the correct rawtext/parsed text location at source .

on vb4 it's possible to replace post string via preg_replace and replace it with own message , example :

PHP Code:

if ((!$this->registry->userinfo[userid]) OR (is_member_of($this->registry->userinfo, 1, 3, 4)))
{
    $this->post['message'] = preg_replace("!<a[^>]*(http|www)(.*)</a>!siU", $vbphrase[nolink], $this->post['message']);  
} 


is there anyone know where is the correct place to use preg_replace for rawtext or parsed text ?

the new code for vb5 must be like this , but where is the correct place ?

PHP Code:

if ((!$userinfo[userid]) OR (is_member_of($userinfo, 1, 3, 4)))
{
    $parsedText = preg_replace("!<a[^>]*(http|www)(.*)</a>!siU", '<a href="register.php">Register / Login to see links</a>', $parsedText);  
} 


Thanks