Try below code in your funcions.php to add tags to portfolio post type in The7.2 theme.
The7 theme have additional meta boxes like page header, sidebar options ect for pages, posts and portfolios. See below how to add the same to your custom post types.
The7 multi purpose theme have page header options where you can set a fancy header, slideshow as page header, but these options cannot set for dynamic page like category, archive, search etc and here is workaround for deal with it.
The7 multi purpose theme have beautiful fancy header that can configure for each page/post. And the same can configure for Woocommerce category pages which is not editable from the backend buy applying facnyheader for woocommece Terms and conditions page. But the problem is it will only return the title you have configured, will not change the title according to category pages and here is a work around to deal with it !
Place this code in your child theme’s functions.php and your portfolio prev next will navigate through the same category in The7 theme !
Add this code to your theme’s or child theme’s functions.php, it will disable The7 testimonials, you can follow the same approach for other custom post types also.