Version 3.3.2
$cfg['Servers'][$i]['hide_db'] = '(mysql|information_schema|phpmyadmin)';
hides for example database with the name "my_mysql_db"
Solution is to change line 92 of List_Database.class.php
to
if (preg_match('/^' . $GLOBALS['cfg']['Server']['hide_db'] . '$/', $db)) {
hope it helps
now i checked version 3.3.5 - the regexp is still the same, but hide_db option is not in the sample config, so better solution is to update documentation in this way:
and to hide both "db1" and "db2" use
$cfg['Servers'][$i]['hide_db'] = '^(db1|db2)$';
Thanks documentation has been updated.