You must have the following plugin to make “Meta Box Group Field” work.
What is Meta Box Group Field?
Meta Box Group Field is Meta Box Add-on that extends a new field named ‘group’ for collectively grouping over 20+ supported fields and able to clone them.
Supported Field Types
- Meta Box by Rilwis
Version 1.0 on June 17, 2014 - Initial Release Version 1.0 on June 23, 2014 - Fixed a minor bug