Codeigniter - get only 1 row from table

I know this is a noob question but atm I can't figure out what i'm doing wrong.

I have model :

PHP Code:

public function getRow($id, $table)    {
$data = NULL;

$this->db->select()
->from($table)
->where('id', $id)
->where_not_in('deleted', '1');

$query = $this->db->get();
if ($query->num_rows() > 0)    {
   return $query->row(); 
}

return NULL;
} 


and in view :

PHP Code:

<?php echo $data->column_name; ?>

This work but if there are no records I get :   Trying to get property of non-object ..

I can't for the life of me remember how I fix the problem last time ...

Website : www.my-web-projects.com