title: Rail simple_form label_method with html
body: <p>what i am making a select where you can choose an icon that comes from font-awesome. At the hearing I do it this way, but does not work ... only shows options blank. Without html_safe tag created hile shown but logically is text only. The raw method did not work.</p>
  
  <pre><code>&lt;%= f.input :icon, :collection =&gt; ["car", "cutlery", "male", "paw", "suitcase", "video-camara", "wheelchair", "calculator", "anchor", "archive", "bell-o", "plug", "wifi", "wrench", "road", "home", "hdd-o", "building-o"], label_method: -&gt;(obj){ raw "&lt;i class=\"fa fa-#{obj}\"&gt;&lt;/i&gt;" } %&gt;
  </code></pre>