php - Custom form validation error message for Codeigniter 2 -

i have drop down named "business_id".

<select name="business_id">      <option value="0">select business</option> more options...  </select> 

here comes validation rule, user must select option.

$this->form_validation->set_rules('business_id', 'business', 'greater_than[0]'); 

problem being error message says: business field must contain number greater 0. not intuitive! want "you must select business".

i tried:

$this->form_validation->set_message('business', 'you must select business'); 

but ci complete ignores this. have solution this?

try not setting value attribute on default select...

<select name="business_id">      <option value>select business</option> more options...  </select>    

and using required form validation rule...

$this->form_validation->set_rules('business_id', 'business', 'required');  

i suppose try editing way you're trying set message also...

$this->form_validation->set_message('business_id', 'you must select business'); instead of $this->form_validation->set_message('business', 'you must select business'); 

i'm not entirely sure if trick though.