show_option_all_included for wp_dropdown_categories

[roxaz]

this little addition lets user have an option which allows searching in all categories included in dropdown only. put it below handling of show_option_all option in wp_dropdown_categories

if($show_option_all_included)
{

$show_option_all = apply_filters( 'list_cats', $show_option_all_included );
$selected = ( '0' === strval($rselected?) ) ? " selected='selected'" : ;
$vals = ;
foreach($categories as $cat)

$vals .= $cat->term_id.',';

$vals = substr($vals, 0, -1);
$output .= "\t<option value='$vals'$selected>$show_option_all</option>\n";

}

[roxaz]

opss code is messed up. grab it at ​http://pastebin.com/iXjGcrc3

[c3mdigital]

There already is a show_option_all choice along with a filter if needed.