Simple BBCode To HTML Function In PHP

While working on a "secret" project I needed a simple BBCode to HTML converter. I'm sure there are a number of them out there, but I wanted to build my own. Here it is, a quick and dirty regex filled function.

function bbc2html($content) {
  $content = preg_replace('/(\[b\])(.*?)(\[\/b\])/','$2',$content);
  $content = preg_replace('/(\[i\])(.*?)(\[\/i\])/','$2',$content);
  $content = preg_replace('/(\[u\])(.*?)(\[\/u\])/','$2',$content);
  $content = preg_replace('/(\[ul\])(.*?)(\[\/ul\])/','
$2
',$content);
  $content = preg_replace('/(\[li\])(.*?)(\[\/li\])/','
$2
',$content);
  $content = preg_replace('/(\[url=)(.*?)(\])(.*?)(\[\/url\])/','$4',$content);
  $content = preg_replace('/(\[url\])(.*?)(\[\/url\])/','$2',$content);
  return $content;
}

In other news this is post #99 since I started the blog. Here's to hoping #100 is stellar.

function bbc2html($content) {
  $search = array (
    '/(\[b\])(.*?)(\[\/b\])/',
    '/(\[i\])(.*?)(\[\/i\])/',
    '/(\[u\])(.*?)(\[\/u\])/',
    '/(\[ul\])(.*?)(\[\/ul\])/',
    '/(\[li\])(.*?)(\[\/li\])/',
    '/(\[url=)(.*?)(\])(.*?)(\[\/url\])/',
    '/(\[url\])(.*?)(\[\/url\])/'
  );

  $replace = array (
    '$2',
    '$2',
    '$2',
    '
$2
',
    '
$2
',
    '$4',
    '$2'
  );

  return preg_replace($search, $replace, $content);
}