Hi Yaobing,
Sorry it's taken me a long time to reply.
Just an idea, but have you thought about adding the ability to assign a shortcut key combination to each of the custom menu items in the Theater View settings? That way, I might be able to use an external application to map the remote control buttons to the shortcut keys and work-around this issue.
It's a real pain having to go back, back, back, down, right, down, OK to jump from one place to another! I just want to be able to press "Guide" on the remote and have it take me to the EPG, regardless of what name I've given it in the menu. Likewise, for the other dedicated buttons like "RecordedTV".