If you need to extract more than one column from an array, you can use array_intersect_key on each element, like so:

function array_column_multi(array $input, array $column_keys) {
    $result = array();
    $column_keys = array_flip($column_keys);
    foreach($input as $key => $el) {
        $result[$key] = array_intersect_key($el, $column_keys);
    }
    return $result;
}