Accordion Atom-X Theme v7

function accordion($id, $array) {
 $html = "<div class='accordion' id='$id'/>\n";
 foreach ($array as $field_id => $data) {
 $active = ($field_id == '0') ? 'in' : '';
 $child = ($field_id == '0') ? '' : 'accordion-n';
 $title = str_replace('/[^A-Z]+$/i', " ",$data['title']);
 $title_id_cc = str_replace(" ", "-", $title);
 $html .= "<div class='accordion-group'>";
 $html .= "<div class='accordion-heading'>";
 $html .= "<a class='accordion-toggle $child' data-toggle='collapse' data-parent='#$id' href='#".$title_id_cc."-".$id."'/> ".$title." <i class='entypo cw'/></i></a>";
 $html .= "</div>\n";
 $html .= "<div id='".$title_id_cc."-".$id."' class='accordion-body collapse $active'><div class='accordion-inner'>\n";
 $html .= $data['content'];
 $html .= "</div></div></div>\n";
 }
 $html .= "</div>\n";
 return $html;
}

$array = [
 0 => [ // must start with 0 always
 'title' => 'Example 1',
 'content' => 'This is a content 1',
 ],
 1 => [
 'title' => 'Example 2',
 'content' => 'This is a content 2'
 ]
];

echo accordion('my-accordion', $array);