Clearing pending workflow items

Is there a way to clear/complete pending workflow items? We just went live and we have discovered some bugs. As a result of the bugs we have some processes which show as a pending workflow. We have processed the changes using the GUI and now we would like to get rid of these workflow items. Is there a way to achieve this?

The best way is to set the Workflow status to "logically deleted". This ensures that the workflow does not do any more processing but it is still kept in the system for audit trail purposes.