Codeigniter: Controller URI with Library

I have a working controller and library function, but I now need to pass a URI segment to the library for decision making, and I'm stuck.

Controller:

function survey($method)
{
    $id = $this->session->userdata('id');
    $data['member'] = $this->home_model->getUser($id);

    //Convert the db Object to a row array
    $data['manager'] = $data['member']->row();
    $manager_id = $data['manager']->manager_id;
    $data['manager'] = $this->home_model->getUser($manager_id);
    $data['manager'] = $data['manager']->row();
    if ($data['manager']->credits == '0')   {
        flashMsg('warning',"You can't complete the assessment until your manager has purchased credit.");
        redirect('home','location');
    }
    elseif ($data['manager']->test_complete == '3'){
        flashMsg('warning',"You already completed the Assessment.");
        redirect('home','location');                        
    }
    else{
        $data['header'] = "Home";
        $this->survey_form_processing->survey_form($this->_container,$data);
    }
}

Library:

function survey_form($container)
{
           if($method ==1){
    $id = $this->CI->session->userdata('id');
    // Setup fields
    for($i=1;$i<18;$i++){
      $fields["a_".$i] = 'Question '.$i;
    }
    for($i=1;$i<17;$i++){
      $fields["b_".$i] = 'Question '.$i;
    }
    $fields["company_name"] = "Company Name";
    $fields['company_address'] = "company_address";
    $fields['company_phone'] = "company_phone";
    $fields['company_state'] = "company_state";
    $fields['company_city'] = "company_city";
    $fields['company_zip'] = "company_zip";
    $fields['job_title'] = "job_title";
    $fields['job_type'] = "job_type";
    $fields['job_time'] = "job_time";
    $fields['department'] = "department";
    $fields['supervisor'] = "supervisor";
    $fields['vision'] = "vision";
    $fields['height'] = "height";
    $fields['weight'] = "weight";
    $fields['hand_dominance'] = "hand_dominance";
    $fields['areas_of_fatigue'] = "areas_of_fatigue";
    $fields['injury_review'] = "injury_review";
    $fields['job_positive'] = "job_positive";
    $fields['risk_factors'] = "risk_factors";
    $fields['job_improvement_short'] = "job_improvement_short";
    $fields['job_improvement_long'] = "job_improvement_long";
    $fields["c_1"] = "Near Lift";
    $fields["c_2"] = "Middle Lift";
    $fields["c_3"] = "Far Lift";
    $this->CI->validation->set_fields($fields);

    // Set Rules

    for($i=1;$i<18;$i++){
      $rules["a_".$i]= 'hour|integer|max_length[2]';
    }
    for($i=1;$i<17;$i++){
      $rules["b_".$i]= 'hour|integer|max_length[2]';
    }
    // Setup form default values
    $this->CI->validation->set_rules($rules);

        if ( $this->CI->validation->run() === FALSE )
        {
            // Output any errors
            $this->CI->validation->output_errors();
        }
        else
        {
            // Submit form
            $this->_submit();
        }
    // Modify form, first load
    $this->CI->db->from('be_user_profiles');
    $this->CI->db->where('user_id' , $id);
    $user = $this->CI->db->get();
    $this->CI->db->from('be_survey');
    $this->CI->db->where('user_id' , $id);
    $survey =   $this->CI->db->get();
    $user = array_merge($user->row_array(),$survey->row_array());
    $this->CI->validation->set_default_value($user);

    // Display page
    $data['user'] = $user;
    $data['header'] = 'Risk Assessment Survey';
    $data['page'] = $this->CI->config->item('backendpro_template_public') . 'form_survey';
    $this->CI->load->view($container,$data);
            }
            else{
                 redirect('home','location');
            }
}

My library function doesn't know what to do with Method...and I'm confused. Does it have something to do with instances in my library?

You can always call the URI Class in your library...

$CI =& get_instance();

// The segments from the url
$uri_segments = $CI->uri->segments_array();

// The segments from the route
$ruri_segments = $CI->uri->rsegments_array();

URI User Guide: http://codeigniter.com/user_guide/libraries/uri.html

Also, in your library function survey_form, the variable $method isn't set. I guess you want to know how to set that to get what you want...? so do this:

function survey_form($container)
{
    $CI =& get_instance();

    $method = $CI->uri->segment(3): // or whichever segment you want

    if($method ==1)
    {
        ....