lordenas,
вариантов много ...
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script>
$(function() {
$('#slider-13 span').html(function(i, num) {
return num - 10
})
});
</script>
</head>
<body>
<div id="slider-13" class="test">
<div class="rangeouter"></div>
<div class="rangeinner"></div>
<div class="rangeselector"></div>
<div class="slider-line">
<span>0</span>
<span>1</span>
<span>2</span>
<span>3</span>
<span>4</span>
</div>
</div>
</body>
</html>