How to supress the initiator as approver in the approver list?

Hi,

I have a requirement that if the initiator of the transaction comes as a approver in the approver list, the approver should be skipped. For example, I have a approval rule like the following -

          Employee (submits) -> Supervisor -> Head of Department -> SMT -> HR Manager -> CEO

Now if the HR Manager himself is initiating the transaction, it should not come to him for approval. After SMT's approval, it should go to CEO directly.

Any ideas how this can be achieved?

Regards,

-Debo