how to unwrap any 3d surface in 2d in nx?

put it in the bath

or even a hot tub is sutible

With NX 11.0, there is a new command of Flattening and Forming.

It is helpful to convert to sheet metal, then use the flange tool when creating your model while using the bend function. If it is an extremely simple model then it'd be as easy as using the unbend command to flatten or "unwrap" and use the flat profile command to get your profile to cut from a laser.