Current page and 'active' class in menu

Hi!

I have a problem, I want set 'active' class to navbar on current page. I tried to something like this but it doesn't work:

PHP Code:

<?=($this->uri->segment(1)==='main/index')?'active':''?>

I have all pages in one controller:

PHP Code:

class Main extends CI_Controller {

    function __construct() {
        parent::__construct();
    }

    public function index() {
        $data['title'] = 'Aktualności';
        $this->load->view('templates/web/header', $data);
        $this->load->view('vrs-pages/index');
        $this->load->view('templates/web/footer');
    }

    public function page_InformacjeTurniej() {
        $data['title'] = 'O turnieju';

        $this->load->view('templates/web/header', $data);
        $this->load->view('vrs-pages/informacje/o-turnieju');
        $this->load->view('templates/web/footer');
    }

    public function page_InformacjeNagrody() {
        $data['title'] = 'Nagrody';
        
        $this->load->view('templates/web/header', $data);
        $this->load->view('vrs-pages/informacje/nagrody');
        $this->load->view('templates/web/footer');
    }

        // ETC ...
} 


How can I do this?