bagaiman supaya data yang tampil di combobox tidak double

bagaiman supaya data  yang tampil di combobox tidak double dengan codeigniter, jadi datanya yang muncul cuma salah satunya aja:
contoh seperti gambar dibawah ini
 
view,, <div class="col-md-4" align="left">Nama paket
                                <select class="form-control" name="id_paket">
                                    <option>--CHOOSEE--</option>
                                        <?php 
                                        foreach($paket->result_array() as $dt){ 
                                        ?> 
                                        <option value="<?php echo $dt['id_paket']?>"><?php echo $dt['nama_paket']?></option> 
                                        <?php 
                                        } 
                                        ?> 
                                </select>
                            </div>
controllers
 
	function layananumroh(){
		cek_session_admin();
		$tingkat1=$this->input->get('id_paket');
		//$tingkat2=$this->input->get('id_');
		// $status=$this->input->get('status');
		$data['paket'] = $this->model_main->paketumroh();
		//$data['paket1'] = $this->model_main->paketimroh();
		$data['caripaket'] = $this->model_main->pencarian_paket($tingkat1)->result_array();
		$this->template->load('Cpanelweb/template','Cpanelweb/mod_cabang/view_paket', $data);
	}
 
model
public function pencarian_paket($tingkat1){
 
         return $this->db->query("SELECT * FROM tbl_nama_paket, bld_paket WHERE tbl_nama_paket.id_paket=bld_paket.id_paket AND bld_paket.id_paket='".$tingkat1."'");
    }