Calendar - Ability to reorganise the order of trainers to group in training categories

In the calendar all of the trainers are currently listed alphabetically. It would be helpful to have the availability to reorganise the way they are listed so that they can be grouped into certain training categories. 

This could be determined either by preset training categories OR if the calendar automatically groups trainers that are scheduled on to similar courses? 


Current Week View (alphabetical) - 




Suggested Week View - 




Current Day View (Alphabetical) shown over two screens - 





Suggested Day View - 


Thanks,
Tahnia