Make object appear within camera view

I'm using google cardboard sdk to create a 360 view. I'm having problems in making an object appear within the view of the camera. For example, when i trigger the magnet, a menu will appear within the view of the camera. I cant attach the menu to the camera as i need to be able to move my head to select the options in the menu with raycast. Attaching the menu to the camera wouldnt allow me to use raycast and select the option. So I would like to make an object that appears on world position depending on the initial rotation position (angle) of the camera. Is this possible?