In config file ( config.inc.php) you can’t set $cfg['Servers'][$i]['only_db'] = ‘my_db‘ . It will return NO DATABASES FOUND
$cfg['Servers'][$i]['only_db']
If set to a (an array of) database name(s), only this (these) database(s) will be shown to the user. Since phpMyAdmin 2.2.1, this/these database(s) name(s) may contain MySQL wildcards characters (“_” and “%”). If you want to use literal instances of these characters, escape them .
use 'my\_db' and not 'my_db'
MySQL, PHP
If you don’t like the dotted outline that appears around every link (see image bellow) you can useĀ this CSS trick :
outline: none;

Example :
a {
outline: none;
}
Later edit : You must add the pseudo class of :focus to work on all IE versions. (thanks to Eric Hoffman )
CSS
CSS, links
People working professionally with web know the difference between screen size and browser content area, but to make it clear I wanted to illustrate that screen size is irrelevant in comparison to other more important metrics.
You can find more information about screen resolution and page layout here
web design
CSS, page layout, web design