nicnack on "adding variable/array to script"

Hi!

Below is a script that creates a widget area. Any widget that is added into this area is contained within a simple <div></div> tag.

I need the script to generate a unique ID per div (widget) created.. so that it would be like:
<div id="name1">widget 1 here</div>
<div id="name2">next widget here</div>
<div id="name1">another widget here</div>
etc..

here is the script:

function arphabet_widgets_init() {

register_sidebar( array(
'name' => 'Home Footer',
'id' => 'home_bottom_1',
'before_widget' => '<div>',
'after_widget' => '</div>',
'before_title' => '<h2 class="rounded">',
'after_title' => '</h2>',
) );
}
add_action( 'widgets_init', 'arphabet_widgets_init' );

any suggestions?
thanks!!