/**         
  * Description     :   This is controller class for the mutli select picklist using jquery.   
  *      
  * Created By      :   Abhi Tripathi
  *
  * Created Date    :   5/17/2014
  *
  * Version         :   V1.0 Created
  *
  **/
public class MutiselectController {

    //String
    public String getSelectedValue {get; set;}

    //This method is to create a select option list for given Picklist Entries
    public static List<SelectOption> getSelectOptionListByField() {
        
        //Describe field and create a list of select options
        List<SelectOption> listOptions = new List<SelectOption>();
        
        //loop throough the picklist entries and populate select list
        for (Schema.PicklistEntry pE : Schema.getGlobalDescribe().get('Contact').getDescribe().fields.getMap().get('Multi_Select__c').getDescribe().getPickListValues()) {
         
            //Populate the select list with values
            listOptions.add(new SelectOption(pE.getValue() , pE.getLabel()));  
        }
        
        //Return list
        return listOptions;
    } 
}