$pages = get_pages("child_of=".get_the_ID());
                        if ($pages) {
                            foreach ($pages as $page) {
                                $ids[] = $page->ID;
                            }
                        };
                        $paged = (get_query_var("paged")) ? get_query_var("paged") : 1;
                        $args = array(
                            "paged" => $paged,
                            "post__in" => $ids,
                            "posts_per_page" =>1,
                            "post_type" => "page"
                        );
                        query_posts($args);

// hàm code phân trang bình thường
 global $wp_query;

                            $big = 999999999;

                            echo paginate_links( array(
                                'base' => str_replace( $big, '%#%', esc_url( get_pagenum_link( $big ) ) ),
                                'format' => '?paged=%#%',
                                'prev_text'    => __('«'),
                                'next_text'    => __('»'),
                                'current' => max( 1, get_query_var('paged') ),
                                'total' => $wp_query->max_num_pages
                            ) );