Nested Menus Plugin

[chrisbloom7]

The Child Menu extension does what you need. It works great for showing a menu of child pages in a sidebar.

Actually it doesn't.
It show only siblings of current page, and I was asking for displaying siblings of defined parent regardless of current page.

Ah, OK, I see what you are after now. I'm not really sure that falls into the scope of what Nested Menus is built for, nor is my plugin really optimized for that behavior. It is closer to what Child Menus aims to do, though currently that plugin is setup to only get the child menu for the current page, not a user-specified page. I would suggest building your own custom plugin to accomplish this, starting by saving the Child Menu plugin file as a different name and then hacking it up to do what you need. I've had to do that for a few plugins of my own when a very custom solution was required.