Keep filter always opened

In order to keep the portfolio filter always opened you can use this CSS code:

#filter li {
  display: block !important;
  height: auto !important;
  width: auto !important;
}
#filter a {
  color: #333;
}

Please add any custom code either in a child theme or inside the dedicated area for  Custom CSS Code under the Theme Options Panel. Never overwrite the theme files.