You should change in the main.php of your theme the next code:
<?php if(osc_count_list_cities()>0) {?>
<div class="box location">
<h3><strong><?php _e("Location", 'modern'); ?></strong></h3>
<ul>
<?php while(osc_has_list_cities()) { ?>
<li><a href="<?php echo osc_search_url(array('sCity' => osc_list_city_name()));?>"><?php echo osc_list_city_name();?></a> <em>(<?php echo osc_list_city_items();?>)</em></li>
<?php } ?>
</ul>
</div>
<?php } ?>
for the next code:
<?php View::newInstance()->_exportVariableToView('list_regions', Search::newInstance()->listRegions('%%%%', '>=') ) ; ?>
<?php if(osc_count_list_regions() > 0) {?>
<div class="box location">
<h3><strong><?php _e("Location", 'modern'); ?></strong></h3>
<ul>
<?php while(osc_has_list_regions()) { ?>
<li><a href="<?php echo osc_search_url(array('sRegion' => osc_list_region_name()));?>"><?php echo osc_list_region_name();?></a> <em>(<?php echo osc_list_region_items();?>)</em></li>
<?php } ?>
</ul>
</div>
<?php } ?>