Alternative Textbox

When I'm using the default GUI textbox in Unity, it's always on top because it's drawn on the screen after rendering. I need the text of the textboxes to be behind other objects, just like the way labels react. I've tried using labels and it works with the depth, but then there's a problem selecting the text. Is there any way to make the textbox appear behind objects, so the player cannot see it and not correspond with it?