Form Validation help

i already do something like that.

this is my code from scratch

PHP Code:

if ($this->input->post('send')) {
            $this->load->library('form_validation');
            $index = 0;
            for ($index = 0; $index < 100; ++$index) {
                if ($this->input->post('host_'.$index.'_templateid') != '') {
                    if ($this->input->post('host_'.$index.'_zabbix_integration')) {
                        $this->form_validation->set_rules(
                            'host_'.$index.'_templateid',
                            'Choix du template ligne '.$index,
                            'required|is_natural_no_zero'
                        );
                        $this->form_validation->set_rules(
                            'host_'.$index.'_ip',
                            'Adresse IP ligne '.$index,
                            'required|valid_ip'
                        );
                        $this->form_validation->set_rules(
                            'host_'.$index.'_suffixe',
                            'Suffixe ligne '.$index,
                            'required'
                        );
                        $this->form_validation->set_rules(
                            'host_'.$index.'_location',
                            'Emplacement ligne '.$index,
                            'required'
                        );
                    } else {
                        $this->form_validation->set_rules(
                            'host_'.$index.'_suffixe',
                            'Suffixe ligne '.$index,
                            'required'
                        );
                        $this->form_validation->set_rules(
                            'host_'.$index.'_location',
                            'Emplacement ligne '.$index,
                            'required'
                        );
                    }
                }
            }

            if ($this->form_validation->run() === true) {
                    // do you insert/update
            }
}