How to load pre selected items of a jquery selectable

How to load pre selected items of a jquery selectable

Hi I have recently created an application that uses a jquery selectable

I have managed to store values that users have selected to a database.The problem i am now facing is if the user would like to change the values which they have selected they would open an edit page which should load the selectable with the values stored in the database.I am able to retrieve the values from the database i am not sure on how to get the values to be selected though

Thanks