How to add content title as dropdown list for exposed filter?
You have to implement a hook_form_alter with a custom module like this:

    function mytools_form_alter(&amp;$form, $form_state, $form_id) {
  if($form_id == 'views_exposed_form') {
    //unset($form['average']);
    $form['average'] = array(
      '#type' =&gt; 'select',
      '#options' =&gt; array(0 =&gt; t('&lt;any&gt;'), 20 =&gt; '*', 40 =&gt; '**', 60 =&gt; '***', 80 =&gt; '****', 100 =&gt; '*****'),
      '#default_value' =&gt; 0,
      '#title' =&gt; t('The average vote is more than'),
    );
  }
}


Where the form_id is your current views form ID (you can see it with firebug in your code).