Is it normal for a coder to have all the controllers in 1 file? Main.php

[eluser]vmirjamali[/eluser]
Essentially just like the header says my coder currently coding with CI has around 2k of lines in main.php and didn't seperate them, here's a snipit:

Code:

function index() {
        $this->load->model('mdlanime');
        $this->load->model('mdlepisode');
        $this->load->helper('url');
        
        $headerData['title'] = 'Watch Anime Online for Free - Anime Episodes, Anime Shows, and Anime Movies all for Free';
        $pageData['latestReleases'] = $this->mdlepisode->GetLatestReleases();
        $pageData['topshows'] = $this->mdlanime->GetPopular(2, 0);
        $pageData['recentcompleted'] = $this->mdlanime->GetRecentCompleted();
        
        $this->load->view('vw_header', $headerData);
        $this->load->view('vw_index', $pageData);
        $this->load->view('vw_divider');
        $this->load->view('vw_sidebar');
        $this->load->view('vw_footer');
        
        $this->output->cache($this->config->item('cacheTime'));
    }
    
    function sidebar() {
        session_start();
        $this->load->helper('url');
        
        if ($this->vbuser->info['userid'] > 0 && !isset($_SESSION['points'])) {
            $this->load->model('mdluserpoints');
            $_SESSION['points'] = $this->mdluserpoints->Get();
        }
        if ($this->vbuser->info['userid'] > 0) {
            $this->vbuser->create_session($this->vbuser->info['userid']);
        }
        
        $this->load->view('vw_sidebar');
    }
    
    function login() {        
        $headerData['title'] = 'Watch Anime Online for Free - Anime Episodes, Anime Shows, and Anime Movies all for Free';
        $pageData['message'] = '';
        $pageData['loggedIn'] = false;
        
        // Process login
        if (isset($_POST['login'])) {
            // Set field requirements
            $this->load->library('form_validation');
            $this->form_validation->set_rules('username', 'username', 'trim|required|min_length[1]|max_length[100]');
            $this->form_validation->set_rules('password', 'password', 'trim|required|min_length[1]|max_length[100]');
            
            if ($this->form_validation->run() == true &&
                $userid = $this->vbuser->is_valid_login($_POST['username'], $_POST['password'])) {
                $this->vbuser->create_session($userid);
                $pageData['loggedIn'] = true;
            }
            else {
                // Failed login
                $pageData['message'] = 'Invalid username or password.';
            }

Is that something needed in CI or is it bad coding practice as i do need scalability with my site? I heard that in other frameworks you can split the controller to many files, so any ideas? Thanks