To do that, first log in and then go to any tab and add it to favorites by tapping a "Heart" button at the top right corner.
After that you'll be able to find this tab in the Favorites section even offline.
Just start the app and go to Favorites section.
In order to delete favorites or add them to Playlists, just long tap on the tab's name.
You can navigate your favorite songs, artists and playlists by tapping 3 white vertical dots at the top right corner.