Monster will be adding new job categories for posting jobs that will not be immediatly available in Bullhorn.
However, this will not affect any posting from Bullhorn to Monster with existing functionality. Simply, the new categories will not be options given to the BH user, until the new code is released.
If you wish to use the new job categories you will need to post your jobs directly through Monster currently, but please note posting the same job order manually as well as through Bullhorn is not supported nor recommended.
The new job categories will be reflected in Bullhorn in an upcoming release.