BBCode Helper 2

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

if ( ! function_exists('bbcode')) { function bbcode($str = '') { $ci =& get_instance(); $ci->load->helper('url');

    $str = $ci->security->xss_clean($str);
 
    $str = strip_tags($str, '<img>');
    $str = auto_link($str);
    
    $str = nl2br($str);
    
    $find = array(
        "~\[b\](.*?)\[/b\]~is",
        "~\[i\](.*?)\[/i\]~is");
        
    $replace = array(
        '<b>\\1</b>',
        '<i>\\1</i>');
        
    return preg_replace($find, $replace, $str);  
}

}

Features

[b][/b] Bold [i][/i] Italic http://url/ Url Image \n New lines!

Improve :)