[SOLVED] How to Change Layout/Position of Predecessor, Successor and Linked Elements

class Activity extends ActivityMain {
 
  // List of fields that will be exposed in general user interface
  // List of fields that will be exposed in general user interface
  public $_sec_description;
  public $id;    // redefine $id to specify its visible place 
  public $reference;
  public $name;
  public $idActivityType;
  public $idProject;
  public $externalReference;  
  public $creationDate;
  public $idUser;
  public $idContact;
  public $Origin;
  public $description;  
  public $_sec_treatment;
  public $idActivity;
  public $idStatus;
  public $idResource;  
  public $handled;
  public $handledDate;
  public $done;
  public $doneDate;
  public $idle;
  public $idleDate;
  public $cancelled;
  public $_lib_cancelled;
  public $idTargetVersion;
  public $result;
  public $_sec_Progress;
  public $ActivityPlanningElement; // is an object
 
  public $_sec_Link;
  public $_Link=array();  
  public $_sec_predecessor;
  public $_Dependency_Predecessor=array();
  public $_sec_successor;
  public $_Dependency_Successor=array();
  public $_Attachment=array();
  public $_Note=array();
  public $_sec_Assignment;
  public $_Assignment=array();
 
  public $_nbColMax=3;
  
}
?>