Fixed what I think was a bug if the user called url function from a theme

@@ -56,7 +56,10 @@ function autoloader($class) {
 
 function url($script, $base_file = false) {
     if (defined(__NAMESPACE__ . '\OVERRIDE')) {
+        $info = Array(pathinfo(DIR), pathinfo(__DIR__));
+
         $base_file = str_replace(__DIR__, DIR, $base_file);
+        $base_file = str_replace($info[1]['dirname'], $info[0]['dirname'], $base_file);
     }
 
     $base_dir = (false === $base_file ? DIR : dirname($base_file));