layout.lib.php

<?php
function head($titel){
    echo '
     <div class="card card-default">
		<div class="card-header"><h2>'.$titel.'</h2></div>
		<div class="card-body">';
}

function foot(){
    echo'</div>
</div>';
}

function menuehead($titel){
   	$titel2 = str_replace(" ","_",$titel);
    echo '
	<li  class="has-sub" >
		<a class="sidenav-item-link" href="javascript:void(0)" data-toggle="collapse" data-target="#'. $titel2 .'"
            aria-expanded="false" aria-controls="ui-elements">
            <span class="nav-text">'. $titel .'</span> <b class="caret"></b>
        </a>
		<ul  class="collapse" id="'. $titel2 .'" data-parent="#sidebar-menu">
			<div class="sub-menu">
			
	';
}

function menuefoot(){
    echo'
			</div>
        </ul>
    </li>';
}
?>