remove repeated item in an array

remove repeated item in an array

Hi all here is my array I need to remove repeated item in this array using
PHP I have tried array_unique function but it fetches me only one Data.
[1] => Array
(
[ref] => CALGB10603
)
[2] => Array
(
[ref] => CALGB10603
)
[3] => Array
(
[ref] => CALGB10603
)
[4] => Array
(
[ref] => CALGB10603
)
[5] => Array
(
[ref] => CAUY922A2109
)
[6] => Array
(
[ref] => CAUY922A2109
)
[7] => Array
(
[ref] => CAUY922A2109
)