<select id="option_selector" name="options">
<option value="option1">Option 1</option>
<option value="option2">Option 2</option>
</select>
<div id="options">
<div id="option1">
<input type="text" name="input1" value="Input 1" />
<input type="text" name="input2" value="Input 2" />
<input type="text" name="input3" value="Input 3" />
</div>
<div id="option2">
<input type="text" name="input4" value="Input 4" />
<input type="text" name="input5" value="Input 5" />
<input type="text" name="input6" value="Input 6" />
</div>
</div>