Save changed value in special heading

Hi there,
first let me say thanks for this great template :) You thought on nearly every wish a normal template user may have :)
Unfortunately our graphic artist has some very special wishes.

To solve one of these issues I modified the ALB Special Heading a little bit.

I added an additional option “special-invers” which is now selectable while using the Special Heading.

                    array(
                        "name"  => __("Special Invers", 'avia_framework' ),
                        "desc"  => __("Choose if you want to invers the heading.", 'avia_framework' ),
                        "id"    => "invers",
                        "type"  => "select",
                        "std"   => "",
                        "subtype" => array( __("No", 'avia_framework' )=>'', __("Yes", 'avia_framework' )=>'special-invers')
                    ),

When settings this to yes I enclose the content in a <span> tag with an inversed class. So far everything works as expected.

 // check if special inversing is wanted
                    if(!empty($invers)) {
                        debug_to_console("covered by inversing");
                        $heading = "<span class='special-invers'>{$heading}</span>";
                    }

How can I save the setting of my own option “special-invers” ?
Now it shows simply the default setting, nevertheless what was choosen.

PHP is not my preferred language, so I’m not that fluid in it.

Thanks in advance.
Michael