Loop on module with a specific category

Loop only on events of a specific category

#$loop|{events,[category_events_mb_id=#$variable|category$#]}|{a}|$#
    {a.name}  
#$/loop|{events,[category_events_mb_id=#$variable|category$#]}|{a}|$#

Create a new variable to allow user to select the wanted category from the BO. This variable should be setup with unit type and "category_events_mb" as module name.