is there Bismark or similar program in tools section of use galaxy online version? Or if there are plans to get one in near future? thanks,

Of course! :)

Have a look at https://usegalaxy.eu. There is bismark and bwa-meth included. In addition same methylation callers and metilene for differential methylation assesment.

You might be also interested in our Training material: http://galaxyproject.github.io/training-material/topics/epigenetics/tutorials/methylation-seq/tutorial.html

Cheers, Bjoern