controller tambah

public function tambah()
    {
        $uri = $this->uri->segment(4);
        $this->_validate();
        $data = array(
            'pertanyaan' => $this->input->post('pertanyaan'),
            'a' => $this->input->post('a'),
            'b' => $this->input->post('b'),
            'c' => $this->input->post('c'),
            'd' => $this->input->post('d'),
            'e' => $this->input->post('e'),
            'jawaban' => $this->input->post('jawaban'),
            'kode_soal' => $uri

        );
        $this->DButama->AddDB($this->table,$data);
        echo json_encode(array("status" => TRUE));
    }