How to post selected values from a dropdown list to database in codeigniter

[eluser]noideawhattotypehere[/eluser]

Code:

<select  size="10" name="yourselect">
<optgroup label="TestGroup">
    <option value="valueone">
      If u click me i will return valueone
    </option>
    <option value="valuetwo">
      I will return valuetwo
    </option>
</optgroup>
</select>

$this->input->post('yourselect'); will return value of the option that user selected.