I want to display a list of all attributes that are added into database but every time I try something it doesn't work. I want to show this inside a div from the from the front page. I tried to insert this into featured.tpl:

<?php 
foreach ($attribute_groups as $attribute_group) {
echo $attribute_group['name'];
print_r($attribute_group);
echo '<select name="listaGrupe">';
foreach ($attribute_groups['attribute'] as $attribute) {
echo '<option value="'.$attribute.'">'.$attribute.'</option>';
}
echo '</select>';
}

?>