Removing deprecated tags for xhtml and removing invalid tags from Title post.

admin/index.php

 		
 		$textile = new Textile();
 		
-		$_POST["title"] = $textile->TextileThis(removeBadTags($_POST["title"]));
+		$_POST["title"] = $textile->TextileThis(removeBadTags($_POST["title"],true));
 		$_POST["description"] = $textile->TextileThis(removeBadTags($_POST["description"]));
 		
 		if (isset($_POST["id_post"])) {

classes/functions.php

  		return $dirs;
  	}
 
-	function removeBadTags($source) {
-		$validTags ='<p><ol><ul><li><a><abbr><acronym><blockquote><code><pre><em><i><strike><s><strong><b><br><span><div><img>';
+	function removeBadTags($source,$secure=false) {
+		if($secure){
+			$validTags ='<abbr><acronym><em><i><strong><b><span>';
+		} else {
+			$validTags ='<p><ol><ul><li><a><abbr><acronym><blockquote><code><pre><em><i><strong><b><br><span><div><img>';
+		}
 		$source = strip_tags($source, $validTags);
 		return preg_replace('/<(.*?)>/ie', "'<'.removeBadAtributes('\\1').'>'", $source);
 	}