Changing the appearance of child items on a List




Im trying to see if there is a way I can change the format of Child items in a list i.e. to make certain child items appear as Bold or italic. This is to be used in a Reporting module , I cant use line items as I need to perform certain calculations on a List that represents the layout of a management PnL. I don't want to use line item subsets as there is no way to change the appearance of the line item subset items i.e. adapt some of the styles use din the blueprint. 



Any ideas ??