In FanFiction you can sort out your stories on the basis of type by following the below mentioned steps:
Step 1: Tap "Just in" from the Tab bar at the bottom of the screen.
Step 2: Tap "Filters" from tool bar of the Just In screen.
Step 3: After tapping Filters a menu will pop up. Tap "Type" to sort out your stories by type.
Step 4: A menu will pop up displaying different available types of the stories. Select your desired type and enjoy your stories.