Update data form modal (solved)

saya mau update data dengan form modal tapi pas diklik, data yang di pilih nggak keambil

controller

public function update(){
		$id_p = $this->input->post('id_p');
		$data = [
			'kd_penyakit' => $this->input->post('kd_penyakit',true),
			'nama'		=> $this->input->post('nama',true),
			'keterangan'	=> $this->input->post('keterangan',true)
		];
	$this->m_penyakit->updatePenyakit($data,$id_p);
	redirect('penyakit');
	}

model

public function updatePenyakit($data,$id_p){
		$this->db->where('id_p',$id_p);
		$this->db->update('tb_penyakit',$data);
	}

view

<tbody>
<?php $no =1; ?>
<?php foreach ($penyakit as $data) : ?>

	<td><?= $no++ ?></td>
	<td><?= $data['kd_penyakit'] ?></td>
	<td><?= $data['nama'] ?></td>
	<td><?= $data['keterangan'] ?></td>
	<td>
	<a	href="javascript:;"
		data-id_p="<?= $data['id_p'] ?>"
		data-kd_penyakit="<?= $data['kd_penyakit'] ?>"
		data-nama="<?= $data['nama'] ?>"
		data-keterangan="<?= $data['keterangan'] ?>"
		data-toggle="modal" data-target="#edit-data">
		<button  data-toggle="modal" data-target="#update-data" class="btn btn-info">Ubah</button>
	</a>
	<a href="#" class="btn btn-danger">Hapus</a>
	</td>
	</tr>
<?php endforeach ?>
</tbody>

<!-- Modal Update -->
<div class="modal fade" id="update-data" tabindex="-1" role="dialog" aria-labelledby="modal-form" aria-hidden="true">
  <div class="modal-dialog modal- modal-dialog-centered modal-" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h3 class="modal-title" id="modal-title-default">Update Data Penyakit</h3>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">×</span>
        </button>
      </div>
      <form action="<?=base_url('penyakit/update')?>" method="post" enctype="multipart/form-data" role="form">
        <div class="modal-body p-0">
          <div class="card bg-secondary shadow border-0">
	    <div class="card-header bg-transparent pb-5">
	      <div class="form-group mb-3">
	        <input type="hidden" id="id_p" name="id_p">
		  <h4>Kode Penyakit<h4>
		    <div class="input-group input-group-alternative">
		      <input class="form-control" id="kd_penyakit" name="kd_penyakit" placeholder="Masukkan Kode Penyakit" type="text">
		    </div>
		  </div>
		  <div class="form-group mb-3">
		    <h4>Nama Penyakit<h4>
		      <div class="input-group input-group-alternative">
		        <input class="form-control" id="nama" name="nama" placeholder="Masukkan Nama Penyakit" type="text">
		      </div>
		    </div>
		    <div class="form-group mb-3">
		      <h4>Keterangan<h4>
		        <div class="input-group input-group-alternative">
			  <textarea class="form-control" rows="5" id="keterangan" name="keterangan" placeholder="Masukkan Keterangan" type="text"></textarea>
			</div>
	              </div>
		    </div>
		  </div>
		</div>
                <div class="modal-footer">
		  <button type="submit" class="btn btn-primary">Save</button>
	          <button type="button" class="btn btn-link  ml-auto" data-dismiss="modal">Close</button>
		</div>
	      </form>
	    </div>
	  </div>
	</div>
<!-- End of Modal Update -->

<script>
$(document).ready(function(){
  $('#edit-data').on('show.bs.modal', function (event) {
    var div = $(event.relatedTarget)
    var modal          = $(this)

    modal.find('#id_p').attr("value",div.data('id_p'));
    modal.find('#kd_penyakit').attr("value",div.data('kd_penyakit'));
    modal.find('#nama').attr("value",div.data('nama'));
    modal.find('#keterangan').html(div.data('keterangan'));
    });
});
</script>