A CodePen by David Pedersen. iOS style button

index.html

<a href="#" class="back-button">Tilbage</a>

script.js

var btn = $('a.back-button'),
    text = btn.text();

btn.attr('data-text', text);

style.css

* {
  -moz-box-sizing: border-box;
       box-sizing: border-box; }

body {
  margin: 50px; }

a {
  text-decoration: none; }

a.back-button {
  position: relative;
  height: 29px;
  width: 54px;
  display: inline-block;
  padding: 0 7px 0 5px;
  background: -webkit-radial-gradient(rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0) 60%) center 19px no-repeat, -webkit-linear-gradient(#a76637 44%, #522403 56%);
  color: white;
  border-top: 1px solid #4c2f1a;
  border-bottom: 1px solid #522301;
  box-shadow: inset 0 1px 0 #975d32;
  text-shadow: 0 -1px 0 black;
  font-family: sans-serif;
  line-height: 29px;
  font-size: 12px;
  font-weight: bold;
  text-indent: -9999px;
  border-radius: 5px; }
  a.back-button:after {
    display: block;
    top: 0;
    bottom: 0;
    right: 8px;
    position: absolute;
    text-indent: 0;
    content: attr(data-text); }
  a.back-button:before {
    position: absolute;
    top: 4px;
    left: -7.6px;
    display: block;
    width: 19px;
    height: 19px;
    background: -webkit-linear-gradient(-135deg, #a76637 44%, #522403 56%);
    box-shadow: inset 1px 0 0 #522301, inset 0 1px 0 #4c2f1a;
    content: "";
    -webkit-transform: rotate(-45deg); }