I need syntax help for a MySQL Trigger in PHPMyAdmin

Hi guys, I am running a WordPress multisite. I have a certain widget that needs to be updated across two other websites when it is updated on the main website.

To show the fields that need to be updated I run the query SELECT * FROMwp_optionsWHEREoption_id= 13082

Which shows me option_id = 13082 ; option_name = widget_adwidget_imagewidget ; option_value = a:5:{i:2;a:5:{s:6:"w_link";s:22:"http://mbgtesting2.com";s:5:"w_img";s:60:"http://mbgtesting2.com/wp-content/uploads/2016/10/header.png";s:8:"w_resize";N;s:5:"w_new";N;s:5:"w_adv";s:14:"New Advertiser";}i:3;a:5:{s:6:"w_link";s:22:"http://mbgtesting2.com";s:5:"w_img";s:86:"http://mbgtesting2.com/wp-content/uploads/2016/08/250x250-banner-Tampa-oct12-13new.jpg";s:8:"w_resize";N;s:5:"w_new";N;s:5:"w_adv";s:14:"New Advertiser";}i:4;a:5:{s:6:"w_link";s:22:"http://mbgtesting2.com";s:5:"w_img";s:84:"http://mbgtesting2.com/wp-content/uploads/2016/08/728x90-banner-Tampa-oct12-13-1.jpg";s:8:"w_resize";N;s:5:"w_new";N;s:5:"w_adv";s:14:"New Advertiser";}i:5;a:5:{s:6:"w_link";s:22:"http://mbgtesting2.com";s:5:"w_img";s:86:"http://mbgtesting2.com/wp-content/uploads/2016/08/250x250-banner-Tampa-oct12-13new.jpg";s:8:"w_resize";N;s:5:"w_new";N;s:5:"w_adv";s:14:"New Advertiser";}s:12:"_multiwidget";i:1;}

So basically when admin changes the widget details it updates the option_value in wp_options. But when that value is updated in wp_options I need it to update to wp_7_options and wp_8_options as well.

And only when that option with the option_id of 13082 is updated, nothing else.

Can anyone please help me with the MySQL syntax for this? As in my PHPMyAdmin I don't have Triggers option, so I want to try adding it with SQL.

Thanks in Advance.
Louis