How to get checkbox value in controller codeigniter?,

This is the view

</div>
          <div>
            <input type="checkbox" name="category[]" value="1"><label>Abarrotes</label>
            <input type="checkbox" name="category[]" value="2"><label>Frutas y verduras</label>
            <input type="checkbox" name="category[]" value="3"><label>Cárnicos</label>
            <input type="checkbox" name="category[]" value="4"><label>Barismo</label>
            <input type="checkbox" name="category[]" value="5"><label>Limpieza</label>
         </div>
</div>

This is the controller


         $this->form_validation->set_rules('category[]', 'Category', 'required');

        if ($this->form_validation->run() == TRUE) {
               $data = array(

                         'category' => $this->input->post('category[]'),

              );