Categories_model::deleteCategory PHP Method

    public function deleteCategory($category_id)
    {
        if (is_numeric($category_id)) {
            $category_id = array($category_id);
        }
        if (!empty($category_id) and ctype_digit(implode('', $category_id))) {
            $this->db->where_in('category_id', $category_id);
            $this->db->delete('categories');
            if (($affected_rows = $this->db->affected_rows()) > 0) {
                foreach ($category_id as $id) {
                    $this->permalink->deletePermalink('menus', 'category_id=' . $id);
                }
                return $affected_rows;
            }
        }
    }