The right way to redirect

[eluser]connors[/eluser]
I'd use

Code:

redirect(site_url('dev/test'), 'refresh');

to ensure the path relative to your index.php (You'll need the url helper for the site_url() function)

To get the message to another page, use flash data.

Code:

$this->session->set_flashdata('upload_message', 'Successfully uploaded '.$data['data']['upload_data']['orig_name']);

While you on your dev/test page retrives it:

Code:

if(isset($this->session->flashdata('upload_message')) echo $this->session->flashdata('upload_message');

See the session library for documentation