Codeigniter alphabetical menu - codeigniter

Question

I want to create simple alphabetical menu, and things look like I'm close to what I want but I have to remove duplicate letters:
in model I use:
public function svi_izvodjaci_za_izbornik()
{
$this->db->order_by('naziv', 'ASC');
$query = $this->db->get('izvodjac');
return $query->result();
}
in controller I use:
public function index()
{
$data['izvodjaci_za_izbornik'] = $this->pocetak_model->svi_izvodjaci_za_izbornik();
$this->load->view('zaglavlje');
$this->load->view('pocetak', $data);
$this->load->view('podnozje');
}
in view I use:
<?php foreach ($izvodjaci_za_izbornik as $izvodjac_za_izbornik): ?>
<?php echo mb_substr($izvodjac_za_izbornik->naziv, 0, 1, 'utf-8'); ?>
<?php endforeach; ?>
and the result is:
Also I plan to pass that letter to controller method who will then call model method that looks something like this:
public function izvodjaci_abecedno($letter)
{
$this->db->like('naziv', $letter, 'after');
$query = $this->db->get('izvodjac');
return $query->result();
}
Thank you for help.

Answer 1

Remove duplicate alphabets like this.use $this->db->distinct();
In your Model
<?php
public function svi_izvodjaci_za_izbornik()
{
$this->db->distinct();
$this->db->select('naziv');//if you nedd to select more columns name seperate by comma like col1,col2,col3,..
$this->db->from('izvodjac');
$this->db->order_by('naziv', 'ASC');
$query = $this->db->get();
return $query->result();
}