wordpress实现分类归档下拉选择框快速导航

<form action="<?php bloginfo('url'); ?>/" method="get">
<?php
	$select = wp_dropdown_categories('show_option_none=快速导航&show_count=0&orderby=name&echo=0&hide_empty=0');
	$select = preg_replace("#<select([^>]*)>#", "<select$1 onchange='return this.form.submit()'>", $select); echo $select; ?>
	<noscript><input type="submit" value="View" /></noscript>
</form>

<select name="archive-dropdown" onChange='document.location.href=this.options[this.selectedIndex].value;'>
<option value=""><?php echo attribute_escape(__('快速导航')); ?>
</option> 
<?php wp_get_archives('type=monthly&format=option&show_post_count=1′);?>
</select>