Yes, I only had centos and mratwork repos. This was a fresh install.
The change in mratwork.repo worked, KloxoMR installed 
Next problem. MariaDB 
I enabled mariadb repo in mratwork.repo and then sh /script/mysql-to-mariadb
It broke everything. Nothing would run. I reinstalled everything, got it back to fresh install. What is way to switch to mariadb now without conflicts?
Thank you Mustafa
Two different of mariadb. From centalt (only work in Centos 6) or from mariadb itself.
Step for using mariadb from centalt:
1. Change /etc/yum.repos.d/mratwork.repo
from:
[mratwork-centalt]
name=MRatWork - centalt - arch
baseurl=http://centos.alt.ru/repository/centos/$releasever/$basearch/
mirrorlist=http://rpms.mratwork.com/repo/mirrors/centalt-centos-$releasever-$basearch-mirrors.txt
enabled=1
gpgcheck=0
exclude=openssh* perl* mariadb*
to:
[mratwork-centalt]
name=MRatWork - centalt - arch
baseurl=http://centos.alt.ru/repository/centos/$releasever/$basearch/
mirrorlist=http://rpms.mratwork.com/repo/mirrors/centalt-centos-$releasever-$basearch-mirrors.txt
enabled=1
gpgcheck=0
exclude=openssh* perl*
2. run 'yum clean all; yum update' (it's assumption current mysql is mysql and not mysql55)
Step for using mariadb from mariadb:
1. Work for current mysql as mysql or mysql55
2. run 'sh /script/mysql-to-mariadb'.