You're welcome. To sync multiple folders of photos to your phone you need to enable syncing of selected folders on the Photos tab of your iTunes sync settings, enabling you to check more than one folder at a time. If you are running Windows, for example, you may have all your photo folders in the My Pictures folder on your computer. In this example, you would choose Sync Photos from My Pictures, then choose Selected folders, then check all the folders containing the photos you want on your phone. This would be similar to the image below:
As mentioned earlier, the combined photos from all the folders will appear on your phone in the photo library album and each of the individual folders will appear as separate albums, but will only contain links to the photos in photo library, not duplicate photos.