Want to show dropdownlist in Jgrid

{
                         name: 'CatagoryName', index: 'CatagoryId', width: 200,
                         sortable: true,
                         align: 'center',
                         editable: true,
                         cellEdit: true,
                         edittype: 'select',

                         editoptions: {
                             value : getSequenceNumbers()

                         },
                         editrules:{required:true}

                         },

function getSequenceNumbers() {
          $.getJSON("/api/SubCatagory/GetCatagory", null, function (data) {
              if (data != null) {
                  $.each(data, function (i) {
                      alert(data[i].CatagoryName);
                      data[i].CatagoryId + ':' + data[i].CatagoryName;


                  })
              }
          });
      }

public SelectList GetCatagory()
      {
          SelectList lstcatagory = ObjRespository.GetListOfCatagory();
          return lstcatagory;

      }