Run functions in index method

[eluser]Casperlarsen94[/eluser]
As i mention in my last topic i'm quite new in Codeigniter.

Is it possible to run a validation or something like that in a index method like this

Code:

function index()
    {
        $data['content'] = 'register_view';
        $this->load->view('template/template', $data);
    }

When i'm trying to do it, it shows my register form twice?

Anyone who can help me?

Thanks