-       public function getFilters() {
-               return array(
-                       new TwigFilter(
-                               'bb2html',
-                               function($text) {
-                                       $ctx = bbcode_create(
-                                               array(
-                                                       '' => array('type' => BBCODE_TYPE_ROOT),
-                                                       'code' => array(
-                                                               'type' => BBCODE_TYPE_OPTARG,
-                                                               'open_tag' => '<pre class="{PARAM}">',
-                                                               'close_tag' => '</pre>',
-                                                               'default_arg' => '{CONTENT}'
-                                                       ),
-                                                       'ul' => array(
-                                                               'type' => BBCODE_TYPE_NOARG,
-                                                               'open_tag' => '<ul>',
-                                                               'close_tag' => '</ul>',
-                                                               'childs' => 'li'
-                                                       ),
-                                                       'li' => array(
-                                                               'type' => BBCODE_TYPE_NOARG,
-                                                               'open_tag' => '<li>',
-                                                               'close_tag' => '</li>',
-                                                               'parent' => 'ul',
-                                                               'childs' => 'url'
-                                                       ),
-                                                       'url' => array(
-                                                               'type' => BBCODE_TYPE_OPTARG,
-                                                               'open_tag' => '<a href="{PARAM}">',
-                                                               'close_tag' => '</a>',
-                                                               'default_arg' => '{CONTENT}',
-                                                               'parent' => 'p,li'
-                                                       )
-                                               )
-                                       );
-                                       $text = nl2br(bbcode_parse($ctx, htmlspecialchars($text)));
-                                       if (preg_match_all('#\<pre[^>]*\>(.*?)\</pre\>#s', $text, $matches) && !empty($matches[1])) {
-                                               foreach($matches[1] as $string) {
-                                                       $text = str_replace($string, str_replace('<br />', '', $string), $text);
-                                               }
-                                       }
-                                       if (preg_match_all('#\<ul[^>]*\>(.*?)\</ul\>#s', $text, $matches) && !empty($matches[1])) {
-                                               foreach($matches[1] as $string) {
-                                                       $text = str_replace($string, str_replace('<br />', '', $string), $text);
-                                               }
-                                       }
-                                       $text = preg_replace(
-                                               array('#(<br />(\r?\n?))*<pre#s', '#</pre>(<br />(\r?\n?))*#', '#(<br />(\r?\n?))*<ul#s', '#</ul>(<br />(\r?\n?))*#', '#(<br />(\r?\n?)){2,}#'),
-                                               array('</p>\2<pre', '</pre>\2<p>', '</p>\2<ul', '</ul>\2<p>', '</p>\2<p>'),
-                                               $text
-                                       );
-                                       return $text;
-                               },
-                               array('is_safe' => array('html'))
-                       )
-               );