Limiting subcategories in the Prestashop Top Menu

In this quick tip we will see how to limit the number of subcategories the top menu displays in Prestashop.

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Notice: if you are using a Prestashop version newer than 1.6.0.11, it’s recommended to apply this modification with an override, as explained here: How to override Prestashop modules

Open up modules/blocktopmenu/blocktopmenu.php

Locate the following method:

protected function generateCategoriesMenu($categories, $is_children = 0)

Inside it, you will notice a conditional block

			if (isset($category['children']) && !empty($category['children']))
			{
				$html .= '<ul>';
				$html .= $this->generateCategoriesMenu($category['children'], 1);

				if ((int)$category['level_depth'] > 1 && !$is_children)
				{
					$files = scandir(_PS_CAT_IMG_DIR_);

					if (count($files) > 0)
					{
						$html .= '<li class="category-thumbnail">';

						foreach ($files as $file)
							if (preg_match('/^'.$category['id_category'].'-([0-9])?_thumb.jpg/i', $file) === 1)
								$html .= '<div><img src="'.$this->context->link->getMediaLink(_THEME_CAT_DIR_.$file)
								.'" alt="'.Tools::SafeOutput($category['name']).'" title="'
								.Tools::SafeOutput($category['name']).'" class="imgm" /></div>';

						$html .= '</li>';
					}
				}

				$html .= '</ul>';
			}

We can do a number of things here. If we comment it out, all submenus will be removed. Otherwise, we can reduce and limit the subcategory levels:

			if ($category['level_depth'] < 4 && isset($category['children']) && !empty($category['children']))
			{
			...

In this case, levels over 3 will not be displayed!