Most developers have several databases with the same structure, f.e. one on the development server & one on the production server.
Unfortunately they have to tune phpMyAdmin for every DB separately. It's very annoying because databases are often complex & their tuning in PMA takes a lot of time.
The idea is to support "database groups", with DBs processed by PMA in the same way.
For example, if I have databases `db_test` & `db_work`, I write to config.inc.php:
$cfg['Servers'][$i]['pmadb_groups']['db_work'] = 'db_test';
.. and `pmadb` settings for both databases are stored in one place with 'db_test' database name.
In particular this works if `db_test` & `db_work` are on different servers & `db_work` is managed on development machine through SSH.
If 3 tables have the same structure, config would be like
$cfg['Servers'][$i]['pmadb_groups']['db_work_1'] = 'db_test';
$cfg['Servers'][$i]['pmadb_groups']['db_work_2'] = 'db_test';
.., etc. I add the patch for phpMyAdmin-3.5.0, saved by Tortoise SVN. All works fine.