Problems with CSS frameworks

[eluser]Stoney[/eluser]
You are trying to call controller prueba_yaml, but you are refferring to Prueba_blue.
Try localhost\coud\index.php\prueba_blue

Your view file is wrong at the controller too, you should change it to $this->load->view('vista_prueba_yaml'); in your case...

You should place the css file to /root/css folder and link it to href = base_url().'css/layout.css'