help with $_GET in CI

[eluser]look66[/eluser]
@ InsiteFX thank you for your reply!
Your reply was exactly what I needed!

I only have one more doubt:
what function this 'if' you posted

[code]
if (method_exists ($ this, $ method))
{
return call_user_func_array (array ($ this, $ method), $ params);
}

show_404 ();
[/ code]