Login as root to your DirectAdmin server.

# vi updatephpmyadmin.sh

Add these:

#!/bin/sh

cd /var/www/html

VERSION=2.7.0-pl1

wget http://surfnet.dl.sourceforge.net/sourceforge/phpmyadmin/phpMyAdmin-$VERSION.tar.gz
tar xzf phpMyAdmin-$VERSION.tar.gz
rm -fr phpMyAdmin phpMyAdmin-$VERSION.tar.gz

find phpMyAdmin-$VERSION -type f -exec chmod 640 {} \;
find phpMyAdmin-$VERSION -type d -exec chmod 750 {} \;
chown -R apache:apache phpMyAdmin-$VERSION
ln -s phpMyAdmin-$VERSION phpMyAdmin

perl -pi -e 's/(..auth_type..\s*=\s*.)config/${1}http/' phpMyAdmin/config.default.php
perl -pi -e 's/(PmaNoRelation_DisableWarning..\s*=\s*)FALSE/${1}TRUE/' phpMyAdmin/config.default.php

exit 0

then press “Esc” and enter the :wq command and press enter

# chmod 755 updatephpmyadmin.sh

Then run it:
# sh updatephpmyadmin.sh
or
# ./updatephpmyadmin.sh

Good luck!