With Bootstrap, how do I show radio inputs as buttons?
You could try looking at button groups, this is a goup of - well- buttons... which is toggleable like a radiobutton.
JSFiddle
HTML
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
<script src="https://code.jquery.com/jquery.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/js/bootstrap.min.js"></script>
<div class="btn-group" role="group" aria-label="...">
<button type="button" class="btn btn-primary">Left</button>
<button type="button" class="btn btn-primary">Middle</button>
<button type="button" class="btn btn-primary">Right</button>
</div>
Hope this helps!
<div class="btn-group" data-toggle="buttons">
<label class="btn btn-primary active">
<input type="checkbox" autocomplete="off" checked> Checkbox 1 (pre-checked)
</label>
<label class="btn btn-primary">
<input type="checkbox" autocomplete="off"> Checkbox 2
</label>
<label class="btn btn-primary">
<input type="checkbox" autocomplete="off"> Checkbox 3
</label>
</div>
jsfiddle-link
getbootstrap
Bootstrap 4 now offers a toggleable button group that manages the active state for you on click.
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css">
<div class="btn-group btn-group-toggle" data-toggle="buttons">
<label class="btn btn-outline-primary active">
<input type="radio" name="options" id="option1" autocomplete="off" checked> Active
</label>
<label class="btn btn-outline-primary">
<input type="radio" name="options" id="option2" autocomplete="off"> Radio
</label>
<label class="btn btn-outline-primary">
<input type="radio" name="options" id="option3" autocomplete="off"> Radio
</label>
</div><link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<div class="btn-group" data-toggle="buttons">
<label class="btn btn-primary">
<input type="radio" name="options" id="option1"> Option 1
</label>
<label class="btn btn-primary">
<input type="radio" name="options" id="option2"> Option 2
</label>
<label class="btn btn-primary">
<input type="radio" name="options" id="option3"> Option 3
</label>
</div>