<form id="revenda">
     <?php
/** The taxonomy we want to parse */
$taxonomy = "localizacao";
/** Get all taxonomy terms */
$terms = get_terms($taxonomy, array(
    "orderby"    => "count",
    "hide_empty" => false,

)
);
   /** Get terms that have children */
   $hierarchy = _get_term_hierarchy($taxonomy);
?>
<select name="terms" id="terms">


    <?php
        /** Loop through every term */
        foreach($terms as $term) {
            /** Skip term if it has children */
            if($term->parent) {
                continue;
            }
            echo '<option value="' . $term->slug . '">' . $term->name . '</option>';
        }
    ?>
    </select>
 </form>