for iOS 9.1 software

connected to your computer. In iTunes, select iPhone, then click Apps.
Start over. Go to Settings > General > Reset, then tap Reset Home
Screen Layout to return the Home screen and apps to their original
layout. Folders are removed and the original wallpaper is restored.
Organize with folders
Create a folder. While arranging apps, drag one app onto another. Tap
the name of the folder to rename it. Drag apps to add or remove them.
Press the Home button when you finish.
You can have multiple pages of apps in a folder.
Delete a folder. Drag out all the apps—the folder is deleted
automatically.