navbar.php

<div class="navbar">
  <a class="active" href="index.php"><i class="fa fa-fw fa-home"></i>&nbsp;Home</a>
  <div class="dropdown">
    <button class="dropbtn">Tables
      <i class="fa fa-caret-down"></i>
    </button>
    <div class="dropdown-content">
      <a href="./showall.php?table=Facilities">Facilities</a>
      <a href="./showallqueried.php?query=Students">Students</a>
      <a href="./showallqueried.php?query=Employees">Employees</a>
      <a href="./showall.php?table=Vaccinations">Vaccinations</a>
      <a href="./showall.php?table=Infections">Infections</a>
      <a href="./showall.php?table=StudentRegistrations">Student Registrations</a>
      <a href="./showall.php?table=Schedules">Schedules</a>
    </div>
  </div> 
  <a href="custom.php"><i class="fa fa-fw fa-circle-question"></i>&nbsp;Custom Queries</a>
  <a href="diagram.php"><i class="fa fa-fw fa-diagram-project"></i>&nbsp;E/R Diagram</a>
  <a href="about.php"><i class="fa fa-fw fa-circle-info"></i>&nbsp;About</a>
</div>