參考網址：Bootstrap 5 Sidebar Examples
用手機瀏覽時，希望右側選單能夠自動隱藏，以免浪費太多空間。
這個網站提供了一些範例。
選擇了它的Example 1 – Demo
<div class="container-fluid">
<div class="row flex-nowrap">
<div class="col-auto col-md-3 col-xl-2 px-sm-2 px-0 bg-dark">
<div class="d-flex flex-column align-items-center align-items-sm-start px-3 pt-2 text-white min-vh-100">
<a href="/" class="d-flex align-items-center pb-3 mb-md-0 me-md-auto text-white text-decoration-none">
<span class="fs-5 d-none d-sm-inline">Menu</span>
</a>
<ul class="nav nav-pills flex-column mb-sm-auto mb-0 align-items-center align-items-sm-start" id="menu">
<li class="nav-item">
<a href="#" class="nav-link align-middle px-0">
<i class="fs-4 bi-house"></i> <span class="ms-1 d-none d-sm-inline">Home</span>
</a>
</li>
<li>
<a href="#submenu1" data-bs-toggle="collapse" class="nav-link px-0 align-middle">
<i class="fs-4 bi-speedometer2"></i> <span class="ms-1 d-none d-sm-inline">Dashboard</span> </a>
<ul class="collapse show nav flex-column ms-1" id="submenu1" data-bs-parent="#menu">
<li class="w-100">
<a href="#" class="nav-link px-0"> <span class="d-none d-sm-inline">Item</span> 1 </a>
</li>
<li>
<a href="#" class="nav-link px-0"> <span class="d-none d-sm-inline">Item</span> 2 </a>
</li>
</ul>
</li>
<li>
<a href="#" class="nav-link px-0 align-middle">
<i class="fs-4 bi-table"></i> <span class="ms-1 d-none d-sm-inline">Orders</span></a>
</li>
<li>
<a href="#submenu2" data-bs-toggle="collapse" class="nav-link px-0 align-middle ">
<i class="fs-4 bi-bootstrap"></i> <span class="ms-1 d-none d-sm-inline">Bootstrap</span></a>
<ul class="collapse nav flex-column ms-1" id="submenu2" data-bs-parent="#menu">
<li class="w-100">
<a href="#" class="nav-link px-0"> <span class="d-none d-sm-inline">Item</span> 1</a>
</li>
<li>
<a href="#" class="nav-link px-0"> <span class="d-none d-sm-inline">Item</span> 2</a>
</li>
</ul>
</li>
<li>
<a href="#submenu3" data-bs-toggle="collapse" class="nav-link px-0 align-middle">
<i class="fs-4 bi-grid"></i> <span class="ms-1 d-none d-sm-inline">Products</span> </a>
<ul class="collapse nav flex-column ms-1" id="submenu3" data-bs-parent="#menu">
<li class="w-100">
<a href="#" class="nav-link px-0"> <span class="d-none d-sm-inline">Product</span> 1</a>
</li>
<li>
<a href="#" class="nav-link px-0"> <span class="d-none d-sm-inline">Product</span> 2</a>
</li>
<li>
<a href="#" class="nav-link px-0"> <span class="d-none d-sm-inline">Product</span> 3</a>
</li>
<li>
<a href="#" class="nav-link px-0"> <span class="d-none d-sm-inline">Product</span> 4</a>
</li>
</ul>
</li>
<li>
<a href="#" class="nav-link px-0 align-middle">
<i class="fs-4 bi-people"></i> <span class="ms-1 d-none d-sm-inline">Customers</span> </a>
</li>
</ul>
<hr>
<div class="dropdown pb-4">
<a href="#" class="d-flex align-items-center text-white text-decoration-none dropdown-toggle" id="dropdownUser1" data-bs-toggle="dropdown" aria-expanded="false">
<img src="https://github.com/mdo.png" alt="hugenerd" width="30" height="30" class="rounded-circle">
<span class="d-none d-sm-inline mx-1">loser</span>
</a>
<ul class="dropdown-menu dropdown-menu-dark text-small shadow">
<li><a class="dropdown-item" href="#">New project...</a></li>
<li><a class="dropdown-item" href="#">Settings</a></li>
<li><a class="dropdown-item" href="#">Profile</a></li>
<li>
<hr class="dropdown-divider">
</li>
<li><a class="dropdown-item" href="#">Sign out</a></li>
</ul>
</div>
</div>
</div>
<div class="col py-3">
Content area...
</div>
</div>
</div>
順道改了$Main_menu和$Admin_menu
將陣列變成二維陣列，以便加入icon及target功能
"/$web_name/work/work.php"=> array("name"=>"會前作業","icon"=>"mbri-setting","target"=>"_blank" );
需要修改的地方是所有目錄下config.php
main.htm main_iframe.htm
增加選單前面的icon
用https://icons.getbootstrap.com/ 的搜尋功能可以快速找到相關的icon
bootstrap icon改為v1.11.3 需修改bs_header.htm
<!-- <link rel="stylesheet" href="/{{ $theme.web_name }}/themes/assets/bootstrap/css/bootstrap-icons.css"> -->
<link rel="stylesheet" href="/{{ $theme.web_name }}/themes/assets/bootstrap/css/bootstrap-icons/font/bootstrap-icons.css">