roykin/override/classes/Category.php

<?php

class Category extends CategoryCore
{
    const CATEGORY_HOME = 2;
    const CATEGORY_COLLECTION = 3;
    const CATEGORY_COLLECTION_ALL = 8;
    const CATEGORY_SAVEUR = 12;
    const CATEGORY_SAVEUR_ALL = 27;
    const CATEGORY_PLV = 71;
    const CATEGORY_PLV_ALL = 72;
    const CATEGORY_TPDBELGE = 75;
    const CATEGORY_TPDBELGE_ALL = 80;

    public static function getCategoriesTree($id_parent, $currentDepth = 0, $depth = 3, $context = null) 
    {
        if(!$context) 
        {
            $context = Context::getContext();
        }

        if($currentDepth >= $depth)
        {
            return false;
        }

        $query = '
            SELECT DISTINCT c.`id_category`, cl.`name`
            FROM `'._DB_PREFIX_.'category` c
            LEFT JOIN `'._DB_PREFIX_.'category_lang` cl ON cl.`id_category` = c.`id_category`
            LEFT JOIN `'._DB_PREFIX_.'category_shop` cs ON cs.`id_category` = c.`id_category`
            WHERE c.`id_parent` = '.$id_parent.'
            AND c.`active` = 1
            AND cl.`id_lang` = '.$context->language->id.'
            AND cs.`id_shop` = '.$context->shop->id.'
            AND cl.`id_shop` = '.$context->shop->id.'
            ORDER BY cs.`position` ASC
        ';

        $categories = Db::getInstance()->executeS($query);
        
        if(!$categories)
        {
            return false;
        }

        foreach($categories as $key => $category)
        {
            $categories[$key]['link'] = $context->link->getCategoryLink($category['id_category']);
            $categories[$key]['children'] = self::getCategoriesTree($category['id_category'], $currentDepth+1, $depth, $context);

            if($categories[$key]['children'])
            {       
                foreach($categories[$key]['children'] as $idx => $childrenCategory)
                {
                    $categories[$key]['children'][$idx]['link'] = $context->link->getCategoryLink($childrenCategory['id_category']);
                }
            }
        }
        
        return $categories;
    }
}