Shortens long URLs to http://www.example.com/long/url...
function _filter_url_trim($text, $length = NULL) {
static $_length;
if ($length !== NULL) {
$_length = $length;
}
// Use +3 for '...' string length.
if ($_length && strlen($text) > $_length + 3) {
$text = substr($text, 0, $_length) . '...';
}
return $text;
}