JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/ui-lightness/jquery-ui.css">
<select name='input_34' id='input_1_34'  class='small gfield_select' tabindex='1' >
    <option value='29' >Alabama</option>
    <option value='34' >Alaska</option>
    <option value='43' >Arizona</option>
</select>

<select name='input_13' id='input_13' class='small gfield_select'  tabindex="2"> 
    <option value='-1' selected='selected'>Select a base</option> 
    <option class="level-0" value="29">Alabama</option> 
    <option class="level-1" value="30">&nbsp;&nbsp;&nbsp;Anniston Army Depot</option> 
    <option class="level-1" value="333">&nbsp;&nbsp;&nbsp;Fort Rucker</option> 
    <option class="level-1" value="32">&nbsp;&nbsp;&nbsp;Maxwell-Gunter AFB</option> 
    <option class="level-1" value="33">&nbsp;&nbsp;&nbsp;Redstone Arsenal</option> 
    <option class="level-0" value="34">Alaska</option> 
    <option class="level-1" value="35">&nbsp;&nbsp;&nbsp;Eielson AFB</option> 
    <option class="level-1" value="36">&nbsp;&nbsp;&nbsp;Elmendorf AFB</option> 
    <option class="level-1" value="37">&nbsp;&nbsp;&nbsp;Fort Greely</option> 
    <option class="level-1" value="38">&nbsp;&nbsp;&nbsp;Fort Richardson</option> 
    <option class="level-1" value="39">&nbsp;&nbsp;&nbsp;Fort Wainwright</option> 
    <option class="level-1" value="40">&nbsp;&nbsp;&nbsp;USCG ISC Kodiak</option> 
    <option class="level-1" value="41">&nbsp;&nbsp;&nbsp;USCG Juneau</option> 
    <option class="level-1" value="42">&nbsp;&nbsp;&nbsp;USCG Ketchikan</option> 
    <option class="level-0" value="43">Arizona</option> 
    <option class="level-1" value="44">&nbsp;&nbsp;&nbsp;USCG whatever</option> 
    <option class="level-1" value="45">&nbsp;&nbsp;&nbsp;USCG whatever</option> 
</select>

JavaScript

jQuery(document).ready(function() {

    var clone_select = $('#input_13').clone();

    jQuery('#input_1_34').bind('change', function() {
        var selectedValue = jQuery("#input_1_34").val();

        var clone_subset = clone_select
            .find('option')
            .filter('[value="' + selectedValue + '"]')
            .nextUntil('.level-0')
            .clone();
        $('#input_13').empty().append(clone_subset);
    });
});