открываем файл:
module/homefeatured/homefeatured.php
ищем:

public function hookDisplayHome($params)
{
if (!$this->isCached('homefeatured.tpl', $this->getCacheId()))
{
$this->_cacheProducts();
$this->smarty->assign(
array(
'products' => HomeFeatured::$cache_products,
'add_prod_display' => Configuration::get('PS_ATTRIBUTE_CATEGORY_DISPLAY'),
'homeSize' => Image::getSize(ImageType::getFormatedName('home')),
)
);
}


return $this->display(__FILE__, 'homefeatured.tpl', $this->getCacheId());
}

заменяем следующим кодом:

public function hookDisplayHome($params){
$category = new Category(Context::getContext()->shop->getCategory(), (int)Context::getContext()->language->id);
$nb = (int)(Configuration::get('HOME_FEATURED_NBR'));
/*$products = $category->getProducts((int)Context::getContext()->language->id, 1, ($nb ? $nb : 10));*/
$products = $category->getProducts((int)Context::getContext()->language->id, 1, ($nb ? $nb : 10), 'date_add', 'DESC', false, true, true, $nb);

shuffle($products);
$this->smarty->assign(array(
'products' => $products,
'add_prod_display' => Configuration::get('PS_ATTRIBUTE_CATEGORY_DISPLAY'),
'homeSize' => Image::getSize('home_default'),
));
return $this->display(__FILE__, 'homefeatured.tpl');
}

Готово. Теперь при обновлении страницы в блоке рекомендуемых товаров они будет рандомно меняться.