IN BLENDER 2.79b
how can I render a render where the armature is visible and the mesh is hidden Armature
You can't. The armature isn't a mesh or considered as a 'real' 3D object in Blender. It's a visual aide for positioning your mesh, nothing else. Thus why it cannot be rendered.
As said in the Blender Manual
These shapes will never be rendered - like any bone, they are only visible in 3D Views.