SQL query for dynamic table column selection from checkbox in codeigniter?

I am trying to retrieve the columns from the database based on checkbox selection in codeigniter. But I have no idea how to do it?

For example there's a columns in a database table Member:

|  ID   | Name   | Gender   | Status  |
---------------------------------------
|  1    | Anne   |  F       | Member  |
|  2    | Brown  |  M       | Member  |
|  3    | Carl   |  M       | Member  |

---

Then there's checkboxes in the data.php view to select which column to display

<?php echo form_open(data/getData);?>
<label class="col-md-4" for="parameter">Parameter</label>
<div class="col-md-6">
 <input type="checkbox" id="parameter" value="name"> Name <br>
 <input type="checkbox" id="parameter" value="gender"> Gender <br>
 <input type="checkbox" id="parameter" value="status"> status <br>
</div>
<input type="submit" class="btn btn-md btn-info" value="Process" />
<?php echo form_close();?>

Data_model.php:

function getData(){
  //I don't know how to get the dynamic column select from the view to the select query

  $this->db->select(?);
  $this->db->from('member');
  $query = $this->db->get();
  return $query->result();
}

Anyone help me with this please?