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To modify the PHP loop to apply it to every group, you can use nested loops. Here's an example:

$groups = array(
  array('name' => 'Group A', 'members' => array('John', 'Paul', 'George')),
  array('name' => 'Group B', 'members' => array('Ringo', 'George', 'Fred')),
  array('name' => 'Group C', 'members' => array('Mary', 'Jane', 'Bob')),
);

foreach ($groups as $group) {
  echo $group['name'] . ':<br>';

  foreach ($group['members'] as $member) {
    echo '- ' . $member . '<br>';
  }

  echo '<br>';
}

This code will loop through each group in the $groups array, and for each group it will output the group name and the names of its members. The output will look something like this:

Group A:
- John
- Paul
- George

Group B:
- Ringo
- George
- Fred

Group C:
- Mary
- Jane
- Bob