<!-- If you would like an equal five and ten column layout in Twitter Bootstrap, 
then include the following CSS in your Bootstrap stylesheet -->

<style>
.tencolumn .span1 {
	width: 7.6923076923076925%;
	*width: 7.628205128205129%;
}
.fivecolumn .span2 {
    width: 17.94871794871795%;
	*width: 17.884615384615383%;
}
</style>

<!-- Applying the classes to your HTML -->
<div class="row fivecolumn">
    <div class="span2">Column 1</div>
    <div class="span2">Column 2</div>
    <div class="span2">Column 3</div>
    <div class="span2">Column 4</div>
    <div class="span2">Column 5</div>
</div>