In Kohana 2 you could easily get that information like this:
echo router::$controller;
echo router::$method;
echo router::$arguments[0-x];
Any
For those using Kohana >= 3.1, it might be useful to notice that some properties of the Request object have been converted to methods.
E.g. Request::controller
is now Request::controller()
(or $this->request->controller()
when you're inside a controller).
For more information, I'd like to reference to the Kohana upgrade guide on http://kohanaframework.org/3.1/guide/kohana/upgrading