validation

public function input_data_pengguna() {
			$id_posisi = $this->input->post("id_posisi", TRUE);

			if ($id_posisi == "1") {

				$this->form_validation->set_rules('nip', 'NIP', 'required', ['required' => "<div class='alert alert-warning'><span class='glyphicon glyphicon-alert'></span><button type='button' class='close' data-dismiss='alert' aria-label='Close' aria-hidden='true'>&times;</button> %s tidak boleh kosong.</p></div>"]);
				if ($this->form_validation->run() == FALSE) {
					 $this->index();
				} else {
					//
				}
			} elseif ($id_posisi == "2") {
				if ($this->form_validation->run() == FALSE) {
					$this->index();
				} else {
					$kata_sandi = $this->input->post("kata_sandi", TRUE);
					$kata_sandihash = password_hash($kata_sandi, PASSWORD_DEFAULT);
					$data = [
						"id_posisi" => $id_posisi,
						"kata_sandi" => $kata_sandihash,
						"nip" => $this->input->post("nip", TRUE),
						"nis" => $this->input->post("nis", TRUE),
						"alamat" => $this->input->post("alamat", TRUE),
						"nama_lengkap" => $this->input->post("nama_lengkap", TRUE),
						"jenis_kelamin" => $this->input->post("jenis_kelamin", TRUE),
						"nama_pengguna" => $this->input->post("nama_pengguna", TRUE)
					];

					$sql = $this->d_pengguna->add_data($data);
					if ($sql === FALSE) {
						$this->session->set_flashdata("warning_AddData", "<div class='alert alert-warning' role='alert'><span class='glyphicon glyphicon-remove'></span><button type='button' class='close' data-dismiss='alert' aria-hidden='true'>&times;</button> Peringatan: <b>Penghapusan data pengguna tidak bisa dilakukan. Silahkan mencoba kembali! :)</b></div>");
						redirect(site_url("f-c_pengguna/pengguna"));
					} elseif ($sql === TRUE) {
						$this->session->set_flashdata("success_AddData", "<div class='alert alert-success' role='alert'><span class='glyphicon glyphicon-ok'></span><button type='button' class='close' data-dismiss='alert' aria-hidden='true'>&times;</button> <b>Penghapusan data pengguna berhasil dilakukan</b>. Terima kasih :)</div>");
						redirect(site_url("f-c_pengguna/pengguna"));
					} else {
						$this->session->set_flashdata("danger_AddData", "<div class='alert alert-danger' role='alert'><span class='glyphicon glyphicon-remove'></span><button type='button' class='close' data-dismiss='alert' aria-hidden='true'>&times;</button> <b>System ERROR!</b></div>");
						redirect(site_url("f-c_pengguna/pengguna"));
					}
				}
			}
		}