You could also modify your insert array like this:
Code:
$client_data = array(
'account_num' => $client_acct_num,
'title' => $this->input->post('title'),
'first_name' => $this->input->post('first_name'),
'middle_name' => $this->input->post('middle_name'),
'last_name' => $this->input->post('last_name'),
'age' => $this->input->post('age'),
'sex' => $this->input->post('sex'),
'guidelines' => $this->input->post('guidelines'),
'guidelines_signed' => ( $this->input->post('guidelines_signed') == 'yes' ? 'yes' : 'no' ),
'signed_date' => $this->input->post('signed_date'),
'home_address1' => $this->input->post('home_address1'),
'home_address2' => $this->input->post('home_address2'),
'home_city' => $this->input->post('home_city'),
'home_prov' => $this->input->post('home_prov'),
'home_postal' => $this->input->post('home_postal'),
'home_phone' => $this->input->post('home_phone'),
'phone_msg' => $this->input->post('phone_msg'),
'cell_phone' => $this->input->post('cell_phone'),
'work_phone' => $this->input->post('work_phone'),
'work_ext' => $this->input->post('work_ext'),
'email' => $this->input->post('email'),
'home_mail' => $this->input->post('home_mail'),
'mail_address1' => $this->input->post('mail_address1'),
'mail_address2' => $this->input->post('mail_address2'),
'mail_city' => $this->input->post('mail_city'),
'mail_prov' => $this->input->post('mail_prov'),
'mail_postal' => $this->input->post('mail_postal'),
'contact_notes' => $this->input->post('contact_notes'),
'inquiry_type' => $this->input->post('inquiry_type'),
'other_inquiry_type' => $this->input->post('other_inquiry_type'),
'ask_notes' => $this->input->post('ask_notes'),
'visit_date' => $this->input->post('visit_date'),
'time_spent' => $this->input->post('time_spent'),
'assignment_date' => $this->input->post('assignment_date'),
'coordinator_id' => $user_id,
'referred_by' => $this->input->post('referred_by'),
'repeat_client' => $this->input->post('repeat_client'),
'repeat_notes' => $this->input->post('repeat_notes'),
'careplanner_id' => $this->input->post('careplanner_id'),
'case_status' => $this->input->post('case_status'),
'status_change_date' => $this->input->post('status_change_date'),
'church_id' => $this->user_model->get_user_church($user_id)->church_id
);