title: Set a selected option in menu dropdown with codeigniter
body: <p>I chose to use  tag instead of <code>form_dropdown()</code> from Form Helper because i can't set a class atribute to <code>&lt;option&gt;</code> tag.
  So I have a <code>&lt;select&gt;</code> and want to set a item with as <code>"selected"</code>. This data is coming from database. How I set this?
  I saw this: <code>set_select()</code> but I can't make work.
  Does anyone have a solution?</p>