add_action('save_post', 'hhs_repeatable_meta_box_save');
function hhs_repeatable_meta_box_save($post_id)
{
    if (!isset($_POST['hhs_repeatable_meta_box_nonce']) ||
        !wp_verify_nonce($_POST['hhs_repeatable_meta_box_nonce'], 'hhs_repeatable_meta_box_nonce')
    )
        return;

    if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE)
        return;

    if (!current_user_can('edit_post', $post_id))
        return;

    $old = get_post_meta($post_id, 'repeatable_fields');
    $new = array();

    $names = $_POST['name'];
    $dates = $_POST['date'];
    $texts = $_POST['text'];
    $images = $_POST['image'];

    $count = count($names);

    for ($i = 0; $i < $count; $i++) {

        if ($names[$i] != '') :
            $new[$i]['name'] = $names[$i];

            if ($dates[$i] != '') {
                $new[$i]['date'] = $dates[$i];
            };
            if ($texts[$i] != '') {
                $new[$i]['text'] = $texts[$i];
            };

        if ($images[$i] != '' ) {
            $new[$i]['image'] = $images[$i];
        };
        endif;


        if (!empty($new) && $new != $old)
            update_post_meta($post_id, 'repeatable_fields', $new);
        elseif (empty($new) && $old)
            delete_post_meta($post_id, 'repeatable_fields', $old);
    }

}

?>