<p dir="auto">Hello, I'm trying to make 3 columns whith class span 4, but not work:<br>
Example use, note i'm use Bootstrap 3.</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/eea43ae541e16b58b74bb5348f3090a2dbe81a177f02edeac5f856ab193a311b/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f343731303839342f3636363136352f62323263396562632d643762392d313165322d383839392d6533626165313635393237622e706e67"><img src="https://camo.githubusercontent.com/eea43ae541e16b58b74bb5348f3090a2dbe81a177f02edeac5f856ab193a311b/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f343731303839342f3636363136352f62323263396562632d643762392d313165322d383839392d6533626165313635393237622e706e67" alt="captura de pantalla 2013-06-17 a la s 20 51 24" data-canonical-src="https://f.cloud.github.com/assets/4710894/666165/b22c9ebc-d7b9-11e2-8899-e3bae165927b.png" style="max-width: 100%;"></a></p>
<p dir="auto">What am I doing wrong?<br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/1d3572de382ce039e91e004da096a29bb6bc550b9e1428421557f03fad49b7fc/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f343731303839342f3636363135362f38356535336137362d643762392d313165322d383466632d6434356438396265323463352e706e67"><img src="https://camo.githubusercontent.com/1d3572de382ce039e91e004da096a29bb6bc550b9e1428421557f03fad49b7fc/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f343731303839342f3636363135362f38356535336137362d643762392d313165322d383466632d6434356438396265323463352e706e67" alt="captura de pantalla 2013-06-17 a la s 20 50 21" data-canonical-src="https://f.cloud.github.com/assets/4710894/666156/85e53a76-d7b9-11e2-84fc-d45d89be24c5.png" style="max-width: 100%;"></a></p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/ed053220d76b712c7d38bf5286cf31e27a9c5664e3254292b3aff43edff297a7/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f343731303839342f3636363137342f32383534396530612d643762612d313165322d396563642d3936303736313939356662322e706e67"><img src="https://camo.githubusercontent.com/ed053220d76b712c7d38bf5286cf31e27a9c5664e3254292b3aff43edff297a7/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f343731303839342f3636363137342f32383534396530612d643762612d313165322d396563642d3936303736313939356662322e706e67" alt="captura de pantalla 2013-06-17 a la s 20 50 21" data-canonical-src="https://f.cloud.github.com/assets/4710894/666174/28549e0a-d7ba-11e2-9ecd-960761995fb2.png" style="max-width: 100%;"></a><br>
Hello, I'm trying to make 3 columns whith class span 4, but not work:<br>
Example use:</p>
<div dir="auto">
    <div dir="auto">
        <div dir="auto">
            Sidebar content
        </div>
        <div dir="auto">
            Body content
        </div>
        <div dir="auto">
            Sidebar 2
        </div>
    </div>
</div>
<p dir="auto">What am I doing wrong?</p>