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    <p>You're correct that ZF 1.8 doesn't support grouping of options in this way. You could easily look at the code inside <code>Zend_View_Helper_FormRadio</code> and create your own view helper that supports a multi-dimensional array (ie the select groupings). I had to do this already for a project, check out the example at <a href="http://pastebin.com/f1dd448e3" rel="noreferrer">pastebin.com</a></p> <p>PHP:</p> <pre><code>$form-&gt;addElement('radio', 'test', array( 'helper'=&gt;'formMultiRadio', 'label'=&gt;'Test Thing', 'multiOptions'=&gt;array( 'Test'=&gt;array('1'=&gt;'1', '2'=&gt;'2'), 'Test 2'=&gt;array('3'=&gt;'3', '4'=&gt;'4'), 'Test 3'=&gt;array('5'=&gt;'5', '6'=&gt;'6'), ), )); </code></pre> <p>Resulting HTML:</p> <pre><code>&lt;dt id="test-label"&gt;&lt;label for="test" class="optional"&gt;Test Thing&lt;/label&gt;&lt;/dt&gt; &lt;dd id="test-element"&gt; Test&lt;br /&gt; &lt;label for="test-1"&gt;&lt;input type="radio" name="test" id="test-1" value="1" /&gt;1&lt;/label&gt;&lt;br /&gt; &lt;label for="test-2"&gt;&lt;input type="radio" name="test" id="test-2" value="2" /&gt;2&lt;/label&gt;&lt;br /&gt; Test 2&lt;br /&gt; &lt;label for="test-3"&gt;&lt;input type="radio" name="test" id="test-3" value="3" /&gt;3&lt;/label&gt;&lt;br /&gt; &lt;label for="test-4"&gt;&lt;input type="radio" name="test" id="test-4" value="4" /&gt;4&lt;/label&gt;&lt;br /&gt; Test 3&lt;br /&gt; &lt;label for="test-5"&gt;&lt;input type="radio" name="test" id="test-5" value="5" /&gt;5&lt;/label&gt;&lt;br /&gt; &lt;label for="test-6"&gt;&lt;input type="radio" name="test" id="test-6" value="6" /&gt;6&lt;/label&gt; &lt;/dd&gt; </code></pre>
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