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

                if ((int)$category['level_depth'] == 2)
                {
                    $files = scandir(_PS_CAT_IMG_DIR_);

                    if (count($files) > 0)
                    {
                        $html .= '<li id="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>';
            }