To solve the Same-Origin Policy problem, you could build a simple PHP page - on a service like Heroku, InfinityFree.net or 000WebHost - with the following code:

<?php
// Page get.php
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET, POST');
header("Access-Control-Allow-Headers: X-Requested-With");

$token = $_GET['token'];
$page = $_GET['page'];
echo file_get_contents("https://wapka.org/$token/$page");
?>

So on your Wapka site you could use the following code:

<div id="content"></div>
<script>$.ajax({
   url:'https://phpsite.com/get.php?toke=:VAR(token);&page=dashboard',
   type:'GET',
   success: function(data){
       $('#content').html($(data).find('#collapseSites').html());
   }
});
</script>

Since it is a persistent session token, you can login once, copy the token and add it to a variable, then you can create the Ajax URLs to get the content of different pages of your Wapka dashboard - Just make sure you don't log out, otherwise you'll have to copy the new token again.

Sorry for the late response, but I'm afraid you can't do that. You cannot change the wapka dashboard code, you can only change the codes of your sites - note that the codes you add using the dashboard are not applied to the dashboard itself.