title: Yii add code to HTML headers
body: <p>I am using the Yii Framework, Let's say all my pages use the same layout templates. Once in a while, for some specific controller/actions I want my HTML  to have some extra code (extra css, javascript, meta ...).</p>
  
  <p>What's the conventional way to achieve this? Creating a new layout seems overkill.</p>
  
  <p>In GRAILS you can just write the extra html you want.</p>