quick way:
/usr/local/cpanel/bin/updatephpmyadmin --force
fun way: (Version information: 3.3.8*)
cd /usr/local/cpanel/base/3rdparty
wget http://downloads.sourceforge.net/project/phpmyadmin/phpMyAdmin/3.3.8/phpMyAdmin-3.3.8-all-languages.tar.bz2
tar -jxvf phpMyAdmin-3.3.8-all-languages.tar.bz2
mv phpMyAdmin/ phpMyAdmin-bak
mv phpMyAdmin-* phpMyAdmin/
cd phpMyAdmin-bak
cp config.inc.php ../phpMyAdmin/
cd ..
chown -R cpanel:cpanel phpMyAdmin