The menus (Directories) inside the course learning objects allows drag and drop but it seems that menus of the same level are ordered based on it's creation date, so it's not really possible to reorder them. I'm not sure if it's a bug or intended behavior. I see two possible solutions if it isn't the intended behavior:
1. Allows the user to ordering Menus of the same level manually, which seems preferable.
2. Orders the menus to Alphabetical sorting.