As i already told you that Facebook has lot of privacy setting. By using it you can make your Facebook account highly secure and private. Now Facebook user has his control over lot of things on his Facebook account and hiding Facebook friend list from other. It is also part of Facebook privacy setting. In case if you don’t want strangers to see your friend list then you can just hide it from them. Hiding Facebook friend list from public or from your Facebook friends is very easy. For hide your Facebook friend list from public just follow the this guide:
Step 1: Login to your Facebook account.
Step 2: Now go to your Timeline/Profile page.
Step 3: Click the Friends option which is under your cover photo. It will open your a list of all of your friends.
Step 4:Now click on Manage button at the top right next to the + Find Friends button. It is pencil like icon.
Step 5: Select Edit privacy. This will open a new window. Where you can manage your privacy settings for your friends list.
Step 6: Now from next to friend list select your privacy option. Click the drop-down menu to choose your privacy option. Now select ‘Only Me’ from drop-down menu and click on done button to save your settings. 
Thus you can hide your Facebook friend list from other. And keeping hidden your Facebook friend list is always better for your privacy.
Also Read: How To Make Your Facebook Profile Picture Private or Non-Clickable