Latest centalt.repo (taken by Kloxo-MR and declare inside mratwork.repo) including php55 for replacing php. Because of it, we have a trouble when running 'yum update' because conflict between centalt's php55 with installed php in server.
To handling this issue, update mratwork.repo with 'yum clean all; yum update mratwork-release'. With this update, php55 will 'exclude' from centalt repo.