要在下拉菜单的标签部分添加标题，请在Bootstrap中使用dropdown-header类：
<!DOCTYPE html> <html> <head> <title>Bootstrap Example</title> <link href = "/bootstrap/css/bootstrap.min.css" rel = "stylesheet"> <script src = "/scripts/jquery.min.js"></script> <script src = "/bootstrap/js/bootstrap.min.js"></script> </head> <body> <div class = "dropdown"> <button type = "button" class = "btn dropdown-toggle" id = "dropdownMenu1" data-toggle = "dropdown"> Diet <span class = "caret"></span> </button> <ul class = "dropdown-menu pull-right" role = "menu" aria-labelledby = "dropdownMenu1"> <li role = "presentation" class = "dropdown-header">Vegetables</li> <li role = "presentation"> <a role = "menuitem" tabindex = "-1" href = "#">Potato</a> </li> <li role = "presentation"> <a role = "menuitem" tabindex = "-1" href = "#">Tomato</a> </li> <li role = "presentation"> <a role = "menuitem" tabindex = "-1" href = "#"> Brocolli </a> </li> <li role = "presentation" class = "dropdown-header">Fruits</li> <li role = "presentation"> <a role = "menuitem" tabindex = "-1" href = "#"> Apple </a> </li> <li role = "presentation"> <a role = "menuitem" tabindex = "-1" href = "#"> Kiwi </a> </li> </ul> </div> </body> </html>