Hi,
Click on the blue LISTINGS tab, then the green "Folders" tab under it. This will take you to a page where you can create the folders to keep your listings organized however you want to.
Then open up all of your saved listings, which presently I assume are in a "No Folder" status. Tick the boxes next to the ones you want in your new folders and chose "Move to Folder". There will be a pull down of your newly created folders to chose from. Chose the one you want that group of listings to go into. Then move on to to more listings until you have moved them from "No Folder" to the specific new folders you created.
Hope that helps.
Wanda