Google+ comes with good privacy settings in social networking sites. We can hide friends circles just like how we hide showing friends list in Facebook.
Let see how to hide your friends in Google+ circles from your profile visitors in simple steps.
Login to your Google+ Profile
Click on your Name ( Right side top corner )
Go to Profile
Click Edit Profile (big one in right side top corner )
On the left side, under your photo, there are two circles(which looks like Globe) click on that circle.
Uncheck “Show people in” and “Show people who have added you to circles”.how to hide friends in circles in google+
Click Done ( Top )
Thats it. Your friends in Circle are not visible to anyone.