Twitter bootstrap and spans

HTML

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/css/bootstrap-combined.min.css">
<script src="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/js/bootstrap.min.js"></script>
		<div class="container">
		            <div class="control-group">
                    <p class="pull-left"><label class="control-label" for="Languages">Lingue</label></p>
                    <div class="controls">
                        <div class="btn-group btn-group-horizontal" data-toggle="buttons-checkbox">
                            <input type="checkbox" value="1" id="Languages_0" name="Languages" checked />
                            <label class="btn btn-info btn-small active" for="Languages_0">Italiano</label>
                            <input type="checkbox" value="2" id="Languages_1" name="Languages" checked />
                            <label class="btn btn-info btn-small active" for="Languages_1">Francese</label>
                            <input type="checkbox" value="3" id="Languages_2" name="Languages" checked />
                            <label class="btn btn-info btn-small active" for="Languages_2">Inglese</label>
                            <input type="checkbox" value="4" id="Languages_3" name="Languages"  />
                            <label class="btn btn-info btn-small " for="Languages_3">Spagnolo</label>
                            <input type="checkbox" value="5" id="Languages_4" name="Languages"  />
                            <label class="btn btn-info btn-small " for="Languages_4">Tedesco</label>
                            <input type="checkbox" value="6" id="Languages_5" name="Languages"  />
                            <label class="btn btn-info btn-small " for="Languages_5">Portoghese</label>
                            <input type="checkbox" value="7" id="Languages_6" name="Languages"  />
                            <label class="btn btn-info btn-small " for="Languages_6">Bulgaro</label>
                    ...

CSS

.btn-group > input[type="checkbox"] {
			    display: none;
			}
			
			input[type="checkbox"] + label.btn {
			    width: 160px;
			}
			input[type="checkbox"]:checked + label.btn {
			    color: #ffff00;
			}