How can I load index() without memory leak?

[eluser]cleansugar[/eluser]
hello.php:

funtion Hello()
{}

function index()
{}

function submit()
{
$name = $this->input->post('formname');
$this->hello_model->insertData($name);
Hello::index();
}

I want to load index page after loading submit() page.
But Hello::index() requires memory at each time it loads recursively.
How can I load index() without memory usage?

I've used redirect(). but it returns error like "duplicated index load".

Please help me.