nested tanavs based on controller/actions

How to nest tabnavs such that the first row has the all the controllers and the second row has all the methods/actions of the selected controller. Each first row tab element      'named' => should be equal to @controller.pluralize (e.g. if Post is the controller then 'named' should be 'Posts')      'link_to' => /@controller/list (e.g. if Post is the controller then 'named' should be '/posts/list') Second row should be dynamic based on the tab selected in the first row     and 'named' should have the method/action names - may be with

Any one can help me with the appropriate Helper/Model/Controller/ Partial/view please?