From BBcode to html ?

<?php
 
define('PUN_ROOT', './');
define('PUN_QUIET_VISIT', 1);
require PUN_ROOT.'include/common.php';
 
$page_title = pun_htmlspecialchars($pun_config['o_board_title']);
define('PUN_ALLOW_INDEX', 1);
require PUN_ROOT.'header2.php';
require PUN_ROOT.'include/parser.php';

?>

<div class="blockform">
    <h2><span>Aktualnosci</span></h2>
       <div class="box">
    <fieldset>
    <br />
       
<?

$zapytanie = "SELECT * FROM topics WHERE forum_id=2 ORDER BY id DESC";
$wykonaj = mysql_query ($zapytanie);

while ($wiersz=mysql_fetch_array ($wykonaj)) 

{

$data = date('d.m.Y',$wiersz['posted']);

echo ("<b>".$wiersz['subject']."</b> - ".$data."<br />Autor: ".$wiersz['poster']."<br /><hr />");

$id=$wiersz['id'];

$zapytanie2 = "SELECT * FROM posts WHERE topic_id=$id LIMIT 1";
$wykonaj2 = mysql_query ($zapytanie2);

while ($wiersz2=mysql_fetch_array ($wykonaj2)) 

{

echo ($wiersz2['message']."<br /><div style=\"text-align: right;\"><a href=\"http://pun.pl/viewtopic.php?id=".$wiersz['id']."\">komentarze(".$wiersz['num_replies'].")</a></div><br />");

}

} 

?>
          </fieldset>
    </div>
</div>
            
<?php
 
require PUN_ROOT.'footer.php';