First make sure you have the LAYERS toolbox active, its under the Windows menu list in Photoshop. Then you deselect the wireframe layer to get rid of them. Working in different layers is really fundamental to Photoshop, think of each one as a different piece of transparent film you can draw on, then select to see it or not or set it to semi-transparent, or a multitude of other things.
If you want to get started, a good place to start is Photoshop tutorials on Google and read thru 'working with layers'.
