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@simsim,

Your diagram isn't incredibly well labelled, at least to my eyes. I don't see where you have a dual DMZ configured, nor do I honestly fully understand your question. 

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@simsim wrote:

If the server in dmz wants to send data to dc server it has to go back through the same switch 

How to avoid this ? 

Why do you think this is a problem that needs to be avoided. Ideally your DMZ wouldn't be allowed to access resources in your DC, but in the event this is needed I would have the traffic separated through different physical switches, or have the DMZ isolated to it's own VRF on any shared switches.