In line((s) that originate from csv file)

14/Feb/2016:15:21:33-0500]http://map1.link.de/mk

what is the easiest part to replace/delete&add

]http://map1.link.de/

with

,

having in mind that after map can come any number map1, map2, map3

Example of couple of lines:

14/Feb/2016:15:21:33-0500]http://map1.link.de/mk
14/Feb/2016:16:21:33-0500]http://map5.link.de/mk

Final result

14/Feb/2016:15:21:33-0500,mk
14/Feb/2016:16:21:33-0500,mk