Requisition Heirarchy based on the Item Catagory

 HI EXPERTS, Hope you all OK ..... I want to make the Requisition Hierarchy based on the Item Category (yes we use to define the item based on the category and we have different categories for different items). now i am looking forward to have a Requisition heirarchy in this manner if a user selects the stationart item for example so this heirearchy could go one boss and another user if select the crockery item so this heirarchy could go to another boss though the final approval of any item is given by the director procurement who is the top of the heirarchy ......