world Space Ui

I have an issue with world space UI and i'm stuck with this problem,
I'm currently using a Rift attaching the UI as a child of the tracking space object of the controller i access the Ui via a button press on the controller.

But as the issue i have is when the controller rotates the menu rotates this is the effect i want i would like the Ui to always face up regardless of the rotation of the parent.

my first attempt was to create a vector3 of the transform

Code (CSharp):

1.  targetpos = new Vector3(transform.position.x, 1.0f, transform.position.z);
2.                                            transform.rotation = Quaternion.LookRotation(targetpos,Vector3.up);
3.      
4.         Debug.DrawLine(transform.position, targetpos, Color.red);
5.  

Im kinda stuck any ideas ?

The image bellow is the type of thing i would like
[EDIT]
Image not loaded in the post added the link;

http://vrux.design/wp-content/uploads/2017/01/toybox-768x497.jpg