zooloo ciao !
facendo come dici tu mi crea un array con dentro gli altri array, e quindi non va bene, allego il print_r

Array
(
[0] => Array
(
[0] => Array
(
[thumb] => thumbs/DSCN0206-xf9a04g7.JPG
[path] => images/DSCN0206-xf9a04g7.JPG
[comm] => Bitta
[id] => 0
[owner] => 0
[kind] => 0
)

)

[1] => Array
(
[0] => Array
(
[id] => 2
[owner] => 1
[kind] => prod
[thumb] => thumbs/avatar-qyv7d4.jpg
[path] => images/avatar-qyv7d4.jpg
[comm] => test image
)

)

)