$total_mhs = count($this->input->post('mhs'));
        $ta        = $this->session->userdata('ta');
        $npm       = $this->input->post('mhs',TRUE);

        $this->db->where_in('npm_mahasiswa', $npm);
        $this->db->where('tahunajaran', $ta);
        $this->db->delete('tbl_khs');

        for ($i=1; $i <= $total_mhs; $i++) {
            $nim     = $this->input->post('mhs['.$i.']');
            $ips     = $this->input->post('ips['.$i.']');
            $totsks  = $this->input->post('sks['.$i.']');
            $ipk     = $this->input->post('ipk['.$i.']');
            $sks_smt = $this->input->post('smt['.$i.']');

            $datax[] = [
                    'npm_mahasiswa' => $nim,
                    'tahunajaran'   => $ta,
                    'ips'           => $ips,
                    'total_sks'     => $totsks,
                    'ipk'           => $ipk
                ];

            $param = ['THSMSTRAKM' => $ta, 'NIMHSTRAKM' => $nim];
            $is_data_available = $this->db->get_where('tbl_aktifitas_kuliah_mahasiswa', $param)->num_rows();

            if ($is_data_available > 0) {
                $datas = [
                    'SKSTTTRAKM' => $totsks,
                    'NLIPKTRAKM' => $ipk
                ];
                $this->db->where('NIMHSTRAKM', $nim);
                $this->db->where('THSMSTRAKM', $ta);
                $this->db->update('tbl_aktifitas_kuliah_mahasiswa', $datas);

            } else {
                $data_akm = [
                    'THSMSTRAKM' => $ta,
                    'KDPTITRAKM' => '031036',
                    'KDJENTRAKM' => 'C',
                    'KDPSTTRAKM' => $this->userid,
                    'NIMHSTRAKM' => $nim,
                    'SKSEMTRAKM' => $sks_smt,
                    'NLIPSTRAKM' => $ips,
                    'SKSTTTRAKM' => $totsks,
                    'NLIPKTRAKM' => $ipk
                ];
                $this->db->insert('tbl_aktifitas_kuliah_mahasiswa', $data_akm);
            }
        }

        $this->db->insert_batch('tbl_khs',$datax);