advice on how to build this array from an array.

hi all, please forgive me if i do not make sense, ill try my best to explain. i have this array or arrays. Array ( [name] => super duplex stainless steels [id] => 30 [page_cat_id] => 10 [main_nav] => true [cat_name] => material range ) Array ( [name] => standard stainless steels [id] => 31 [page_cat_id] => 10 [main_nav] => true [cat_name] => material range ) Array ( [name] => non ferrous [id] => 32 [page_cat_id] => 10 [main_nav] => true [cat_name] => material range ) Array ( [name] => carbon based steels [id] => 33 [page_cat_id] => 10 [main_nav] => true [cat_name] => material range ) is it possible to build an array and use the [cat_name] as the key and assign all the pages to that cat_name? what im trying to achieve is a category of pages but i want the cat_name as the key to all the pages associated to it hope i make sense kind regards Adam