Drop-down menu

I need a drop-down menu that lists a number of subjects, something along the lines of the snippet below.

<div class="publish_l_r"><?php echo elgg_view('input/access',array('internalname' => "category", 'options' => array("","Astronomy","Animal Science","Accounting & Finance"), 'value' => $category,'class'=>'inp_big'));?> </div>

The problem with this code is that when the subject is chosen, a number is saved instead of the actual name. Can anyone point out what I'm doing wrong?