ter Smitten's

phpmyadmin isn’t in the default installed yum repositories. Therefore we have to enable a repository that does contain phpmyadmin. EPEL is such a repository. See here how to enable EPEL.

After that it’s really simple:

yum install phpmyadmin

cd /etc/httpd/conf.d/
nano phpMyAdmin.conf

and change allow from 127.0.0.1 to allow from 127.0.0.1 192.168.1.0/24 (for example)

then:

service httpd reload
service mysqld restart

and browse http://192.168.1.1/phpmyadmin