Hi Piotr,
thank you for your prompt reply. I' ve done all you said in your answer and now I have the same customization as for the demo but, in works page, it does not work properly in fact, I set new categories and applyed them to my pictures. First of all in the filter array some categoryes do not appear and furthermore the filter does not work..... for example if I click on "Street photography" nothing happens....
What have i to do to fix it???
You can see what I have tried to explain in "http://www.francescolavinia.it/"
thanks a lot for your kind cooperation