$rslist = $FlowPackage->order('id asc')->paginate(10)->each(function($item, $key){
    $item['typename'] = RegionSurface::where('id',$item['type'])->value('name');
    switch ($item['flow_company']) {
        case 0:
            $item['flow_company'] = "GB";
            break;
        case 1:
            $item['flow_company'] = "TB";
            break;
        case 2:
            $item['flow_company'] = "PB";
            break;
    }
    return $item;
});