Hi all i have a problem in dropdown in CI

[eluser]Unknown[/eluser]
1. I have a form called form1. there is a dropdown menu and whenever i select from the dropdown it will display the form2 or form3.
and this is my code....

<div class="form1">
<label>Product Type</label>
<div class="textbox">
&lt;?php
$the_select = array(
'1' => 'test1',
'2' => 'test2',
);
echo form_dropdown('sel',$the_select);
?&gt;
</div>
</div>

please help me.