How do i change link_to with renamed resources?

hi,

i want to re-use resource under different scopes (same views etc…):

scope 'admin' , :myscope=>''admin do resources :photos , as: 'admin_photos' end

resources :photos, :myscope=>''normal

→ how do i change the link_to links dynamically?

i have tried via like this, but no joy …: 'default_url_options { :scope = > params[:myscope] }

pls advise

thx tom