Из такого

нужно, чтоб получилось такое

// поиск в виде виджета
class Ads_Search_Formeds extends WP_Widget {
function Ads_Search_Formeds() {
// widget actual processes
parent::WP_Widget(false, $name = 'Ads_Search_Formeds');
}
function widget($args, $instance){
if( !class_exists('HTML_FormPersister') )
include_once WP_PLUGIN_DIR.'/ads-wordpress/FormPersister.php';
global $ads_options;
// создаем выпад список категорий
$select_rub = wp_dropdown_categories(
array('child_of' =>$ads_options['ads_base_category'],
'hide_empty' => 0, 'hierarchical' => 1,
'name'=>'category__and[]','echo'=>0)
);
$select_rub = preg_replace('~<select[^>]+>~',
'\0<option class="level-0" value="">-----</option>', $select_rub);
// select ГЕО категорий
$select_loc = wp_dropdown_categories(
array('child_of' =>$ads_options['ads_location_root'],
'hide_empty' => 0, 'hierarchical' => 1,
'name'=>'category__and[]','echo'=>0)
);
$select_loc = preg_replace('~<select[^>]+>~',
'\0<option class="level-0" value="">-----</option>',$select_loc);
ob_start();
?><!--create the searchfield-->
<form class="ads_search" method="get" id="searchform" name="searchform" action="<?php bloginfo('home')?>">
<?php _e('Автомобили Б/У', 'ads-wordpress')?>:<br />
<?php _e('Выбрать марку', 'ads-wordpress')?>:<br />
<?=$select_rub; ?><br />
<?php _e('Модель', 'ads-wordpress')?>:<br />
<?=$select_loc; ?><br />
<?php _e('Цена', 'ads-wordpress')?>:<br />
<?php _e('От:', 'ads-wordpress')?><br/> <input type="text" name="ads_price[between][0]" size="12" /><br/>
<?php _e('До:', 'ads-wordpress')?><br/> <input type="text" name="ads_price[between][3]" size="12" /><br/>
<br />
<div align="center"><input type="submit" value="<?php _e('Search', 'ads-wordpress')?>" /></div>
<?
$se_form = ob_get_contents();
ob_end_clean();
$ppb = new HTML_FormPersister();
$st = $ppb->process($se_form);
echo $st;
} // ebd function widget
} // end widget Ads_Search_Formeds
add_action('widgets_init', create_function('', 'return register_widget("Ads_Search_Formeds");'));
// конец виджета
?>