HELP! disable html in textarea

[eluser]codedoode[/eluser]
The title pretty much tells it all. I'm trying to disable the use of html in a textarea. Can anyone shed some light on this subject? Thanks in advance.

this is my controller

Code:

function create()
    {
        $data = array(
            'content' => $this->input->post('content')
        );

        $stripped = strip_tags($data);
        $this->site_model->add_record($data);
        $this->index();
    }

this is my model

Code:

function add_record($data)
    {
        $this->db->insert('data', $data);
    }

what am I doing wrong?