<?php
$array = array(
array( 'type' => 'A', 'month' => 'Jan' ),
array( 'type' => 'B', 'month' => 'Feb' ),
array( 'type' => 'A', 'month' => 'Mar' )
);
function callbackFunc( $val ) {
return $val['type'] == 'A';
}
$result = array_filter( $array, callbackFunc );
print_r( $result );