JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="menu">
    
         <li><a href="#" class="drop">Home</a><!-- Begin Home Item -->
    
     <div class="dropdown_2columns"><!-- Begin home columns container -->
    
     <div class="col_2">
         <h2>Welcome <?php echo $_SESSION['kt_name_usr']; ?> <br /> <span class="welcomeName"><?php echo $row_rs_select_address['name_com']; ?></span></h2>
     </div>
    
     <div class="col_2">
       <table width="60%" cellspacing="0" cellpadding="0">
        <tr>
        <td width="100%"><?php if ($row_rs_adm_mail_flag['read_frm']=='1'){

  					echo '<br />' . '<img src="images/mail.gif" width="18" height="12" />' . " " . 'You have' . " " . '<span class="newitems">' .$totalRows_rs_adm_mail_flag. '</span>'. " " ."New".'<a href="cp.php"> Mail(s)</a>';
					}

					else {

  					echo '<br />' . '<img src="images/nomail.gif" width="18" height="12" />' . " " . '<span class="newitems">'.'You have no new mail'.'</span>';
					}
  ?>
      </td>
      </tr>
      <tr>
      <td width="100%"><?php if ($row_rs_action_flag['new']=='1'){

  					echo '<br />' . '<img src="images/mail.gif" width="18" height="12" />' . " " . '<span class="newitems">'.'You have' . '</span>' . " " . '<span style="font-size:14px;color: #ff0000;">' .$totalRows_rs_action_flag. '</span>'. " ".'new'. " " . '<a href="cp.php" style="font-size:12px;">Actions</a>';}

					else {

  					echo '<br />' . '<img src="images/nomail.gif" width="18" height="12" />' . " " . 'You have no new actions';}

  ?>
      </td>
      </tr>
      <tr>
      <td width="100%"><br />
        <img src="images/help.png" width="18" height="18" align="absmiddle" />
    <span class="newitems">&nbsp;View your <a href="cp/contacts/contacts.php">Contacts</a></span></td>
      </tr>
      <tr>
      <td width="100%"><br />
        <img src="images/feedback_icon.jpg" width="18" height="18" align="absmiddle" />
    <span class="newitems">&nbsp;Submit <a href="javascript:feedback()">Feedback</a></span></td>
      </tr>
   </table>
 ...

CSS

body, ul, li {
	font-size:12px; 
	font-family:Arial, Helvetica, sans-serif;
	line-height:21px;
	text-align:left;
}

#panel {

  z-index:-1;

}

#menu {

 position:relative;
	list-style:none;
	width:96.9%;
	margin:20px auto 0px auto;
	height:43px;
	padding:0px 20px 0px 20px;
 color: black;
	

	/* Background color and gradients */
	
	background: #e0e1e1;
	background: -moz-linear-gradient(top, #d6d6d6, #aeaeae);
	background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#d7d7d7), to(#013953));
	
	/* Borders */
	
	border: 1px solid #000000;


}

#menu li {
	float:left;
	display:block;
	text-align:center;
	position:relative;
	padding: 4px 10px 4px 10px;
	margin-right:30px;
	margin-top:7px;
	border:none;
z-index:5;
}

#menu li:hover {
	border: 1px solid #777777;
	padding: 4px 9px 4px 9px;
	
	/* Background color and gradients */
	
	background: #F4F4F4;
	background: -moz-linear-gradient(top, #F4F4F4, #EEEEEE);
	background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#F4F4F4), to(#EEEEEE));
	
	/* Rounded corners */
	
	-moz-border-radius: 5px 5px 0px 0px;
	-webkit-border-radius: 5px 5px 0px 0px;
	border-radius: 5px 5px 0px 0px;
}

#menu li a {
	font-family:Arial, Helvetica, sans-serif;
	font-size:12px; 
	color: #000;
	display:block;
	outline:0;
	text-decoration:none;
 
	/* text-shadow: 1px 1px 1px #000; */
}

#menu li:hover a {
	color:#161616;
	text-shadow: 1px 1px 1px #ffffff;
}
#menu li .drop {
	padding-right:21px;
	background:url("../img/drop.png") no-repeat right 8px;
}
#menu li:hover .drop {
	background:url("../img/drop.png") no.-repeat right 7px;
}

.dropdown_1column, 
.dropdown_2columns, 
.dropdown_3columns, 
.dropdown_4columns,
.dropdown_5columns {
	margin:4px auto;
	float:left;
	position:absolute;
	left:-999em; /* Hides the drop down */
	text-align:left;
	padding:10px 5px 10px 5px;
	border:1px solid #777777;
	border-top:none;

	/* Gradient background */
	background:#F4F4F4;
	background: -moz-linear-gradient(top, #EEEEEE, #BBBBBB);
	background:...