Article content problem

[f-serv]

hello guys ,,

i'm coding script but i have problem with INSERT & SELECT articles ..
first i'm using BBcode ( MarkItUP ) ..
i wanna my script like vb when i submit article with
php code like
[php...] or [code..]

appear like Vb script

when insert article content i'm using this function

function anti_xss($content)
{
  $content = htmlentities($content);
  $content = mysql_real_escape_string($content);
  if(get_magic_quotes_gpc())

  {
  $content = stripslashes($content);
  }
  return $content ;
}

When select using

 		 			 $content = ToHtml(nl2br($row['content']));
echo $content;

when article content include form html code in [php ..] it's appear form not code

and when using (htmlspecialchars) ..
content appear like this pic

i wanna submit article like vb include font color and size and when have php code appear code not form ..