public static function normalizeUrl($url)
    {
        foreach (self::$urlPrefixMap as $prefix => $id) {
            if (strtolower(substr($url, 0, strlen($prefix))) == $prefix) {
                return array(
                    'url'      => substr($url, strlen($prefix)),
                    'prefixId' => $id
                );
            }
        }

        return array('url' => $url, 'prefixId' => null);
    }