After installing Magento SUPEE6788 patches my module stop working so as per the instruction provided by magento in http://magento.com/security/patches/supee-6788-technical-details and change config.xml

<admin>
   <routers>
      <adminhtml> 
         <args>
            <modules> 
               <Module_Name after="Mage_Adminhtml">ModuleName_Adminhtml</Module_Name>
            </modules> 
          </args> 
      </adminhtml>
   </routers>
</admin>

it is working with it but I want to make it compatible with magento 1.9.1 and lower how to perform it can anyone had any idea to perform it