Click on your profile, Next Click on column just below your picture which reads work education etc,There would be a action button next to your name, ABOUT , Select , Click on Edit, It will popup menu -Who can see your friend list on your timeline?Select - Only Me
To hide your friend list you need to click on "friends" in the profile and choose "edit" option. Here, you can use that privacy option.....
go on profile setting then choose friend list and click on "only me". Trough this option only you can see your friend list.
In order to hide your friend list from public in your facebook, you have to just click on 'friends' select edit and than 'only me'.
Just click on "friends" in the profile and select "edit" option. Here you can hide your friends list from others. Choose "Only Me".