php - An Array written in top of dropdown in magento -

i adding select field in form , getting available records database, slight problem there written array in top of drop down, want remove it.

foreach ($data $columns) {                      $datacol[] = array(                   "value"    =>  $columns->getcatid(),                   "label"    =>  $columns->getcategory(),);                      }     /* category */     $fieldset->addfield('cat_id', 'select', array(           'label'     => mage::helper('news')->__('category'),           'class'     => 'required-entry',           'required'  => true,           'name'      => 'cat_id',       'values'    =>        array(             array(             'value' => $datacol,              'label'     => mage::helper('news')->__($datacol),             ),  )        ));