[Tu Tran]

So sorry for the delay !

To fix this issue, please go to the file app\code\local\Sns\Megamenu\Helper\Data.php, find and replace the code bellow

foreach($items as $item){
    foreach($this->getSinglePath($item['id'], $groupId, $nametable, $item['lft'], $item['rgt'], FALSE) as $item_collection){
        $collection->addItem($item_collection);
    }
}

By:

foreach($items as $item){
    foreach($this->getSinglePath($item['id'], $groupId, $nametable, $item['lft'], $item['rgt'], FALSE) as $item_collection){
        $collection->addItem($item_collection);
    }
    break;
}

Thanks you,