'',
'value' => ''
),
array(
'label' => 'Alpha',
'value' => 'test'
),
array(
'label' => 'Zeta',
'value' => 'test'
),
array(
'label' => 'alpha',
'value' => 'test'
),
array(
'label' => 'Beta',
'value' => 'test'
)
);
function validate($var)
{
return !empty($var['label']);
}
function cmp($a, $b){
return strcmp($a['label'], $b['label']);
}
$groups = array_filter($groups, 'validate');
usort($groups, 'cmp');
foreach($groups as $a) {
echo "