Each source in its own menu? Movies 1, Movies 2, and so on?

I am trying to have a menu entry for each source, such as ‘Movies source 1’, and ‘Movies source 2’. Basically I want separate my dad’s movies, from the grand kids movies on his raspberry pi b+. The movies are located on a NAS, and each are in their own folder. Is there an easy way to separate these?

http://kodi.wiki/view/Smart_playlists

ok, that works, but how to turn those playlist into menu items in the OSMC skin?

I don’t know. This is a Kodi specific question but is probably dependent on which skin you are using. If I wanted to find out, I would search the Kodi wiki and Kodi forum for clues.