MVC

#Controller
class Test extends CI_Controller {

        public function index()
        {
            $this->load->model('Testmodel');
            $data=array(
                'barang'=>$this->Testmodel->getbarang()
            );
            $this->load->view('testindex', $data);
        }

    }

#Model
class Testmodel extends CI_Model {

    function getbarang(){
        return $this->db->get('produk')->result();
        //Sesuaikan  nama tabelnya
    }

}

#View
<form action="<?=base_url('test/post')?>" method="post">
    <input type="number" name="mutasi" id="" placeholder="No. Mutasi">
    <input type="text" name="kode" id="" placeholder="Kode Ruang">
    <select name="barang" id="">
        <option value="">Pilih Barang</option>
        <?php
            foreach($barang as $key){
                ?>
                <option value="<?=$key->id_produk?>"><?=$key->nama_produk?></option>
                <?php
            }
        ?>
    </select>
</form>