The first step: click the "Phone" icon on the phone as shown below.
Step Two: Then we switch directly to the "Address Book" tab.
Step three: Any contact you want to group, we click on the "Edit" button to enter the contact editing mode.
Fourth step: There will be a "add field" option at the bottom of edit mode as shown in the figure.
Fifth step: Then we click on the Add field, where you can enter the group name of the "nickname" option.
Step Sixth: If we enter a "friend", then click "Finish" on the top right.
Step Seventh: Return when you are done, and you can see the name grouped under the contact name.
Small Tips
Personal feeling iOS7 Contact Group is not an inappropriate user experience, but also can be used, compared to the Android system of contact groups to the feeling that Apple has put itself too high feeling oh, do not take the usual road.