Multi-level navigation and easy menu definition

[yojoe]

Isn't this the standard behaviour?

Yes it is a standard. But I need to show permanently a side-menu consisting of siblings belonging to 1 top lvl parent. This parent is set to not be shown in menu, and after reading for 5th time documentation I could only show all of its siblings as opened.

Maybe I'm doing something wrong, but looking at outputted html all siblings are being outputted no matter what.