Changes in PHP / WordPress Plugin for Link Encoding

Please consider the following WordPress website: [login to view URL] & [login to view URL] Above is the original website and we made a clone of it. [login to view URL] & [login to view URL] Working: When we create a post in main WordPress website it automatically appears in the sub-domain of the website. User select any domain from the list and generates a link to share on facebook. Now we are facing some problems in our cloned website: 1) We want to add "/" at the end of our newly generated link Please see image-1 2) When we share newly generated link on facebook it shows original domain name i.e [login to view URL] , We want that when user share it on facebook, instead of main site there should appear that domain that was selected during link generation. Please see image-2 3) We want a security feature that one script should run only on one domain. 4) When user shares a link on facebook they add UMT at the end of URL, It should work. 5) Menu of [login to view URL] should work. Please see image-3