How can I group same values in a multidimention array?
I want this
array(
array('a' => 1, 'b' => 'hello'),
array('a' => 1, 'b' => 'world'),
array('a' => 2, 'b' => 'you')
)
to become
array(
array(
array('a' => 1, 'b' => 'hello'),
array('a' => 1, 'b' => 'world')
),
array('a' => 2, 'b' => 'you')
)