Как обновить часть страницы?

<div id="cart-block" class="col-xs-5 col-sm-2 shopping-cart-box">
                <a class="cart-link" href="order.html">
                    <span class="title">Ваша корзина</span>
                    <span class="total"><?=$cartTotalProducts?> товара - <?=getPrice($cartTotalPrice)?></span>
                    <span class="notify notify-left"><?=$cartTotalProducts?></span>
                </a>
                <div class="cart-block">
                    <div class="cart-block-content">
                        <h5 class="cart-title">В Вашей корзине: <?=$cartTotalProducts?> товаров</h5>
                        <div class="cart-block-list">
                            <ul>
                            <?php foreach($cartList as $position){
                            if($position->products_discount!=0){$position->products_price-=getDiscount($position->products_price,$position->products_discount);}?>
                            
                                <li class="product-info">
                                    <div class="p-left">
                                        <a href="#" class="remove_link"></a>
                                        <a href="#">
                                        <img class="img-responsive" src="uploads/<?=$position->products_image ?>" alt="p10">
                                        </a>
                                    </div>
                                    <div class="p-right">
                                        <p class="p-name"><?=$position->products_title ?></p>
                                        <p class="p-rice"><?=getPrice($position->products_price,$_SESSION['cart'][$position->products_id])?></p>
                                        <p><?=$_SESSION['cart'][$position->products_id]?></p>
                                    </div>
                                </li>
                                <?php } ?>
                            </ul>
                        </div>
                        <div class="toal-cart">
                            <span>Всего</span>
                            <span class="toal-price pull-right"><?=getPrice($cartTotalPrice)?></span>
                        </div>
                        <div class="cart-buttons">
                            <a href="order.html" class="btn-check-out">Checkout</a>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        
    </div>