nav_bar.php<br>
<!-- Left side column. contains the logo and sidebar -->
<aside class="main-sidebar">
	<!-- sidebar: style can be found in sidebar.less -->
	<section class="sidebar">
		<!-- Sidebar user panel -->
		<div class="user-panel">
			<div class="pull-left image">
				<img src="dist/img/user2-160x160.jpg" class="img-circle" alt="User Image">
			</div>
			<div class="pull-left info">
				<p>
									</p>
				<small>
									</small>
				<!--  <a href="#"><i class="fa fa-circle text-success"></i> Online</a> -->
			</div>
		</div>
		<!-- sidebar menu: : style can be found in sidebar.less -->
		<ul class="sidebar-menu" data-widget="tree">
			<!-- <li class="header">MAIN NAVIGATION</li> -->
						<li >
				<a href="dashboard.php">
            <i class="fa fa-dashboard"></i> <span>Dashboard</span>
        </li>

        
        <li  class="treeview">
          <a href="#">
            <i class="fa fa-files-o"></i> <span>Master Tab</span>
            <span class="pull-right-container">
              <i class="fa fa-angle-left pull-right"></i>
            </span>
          </a>
			
				<ul class="treeview-menu">
					<li  class="treeview"
						>

						<a href="#"><i class="fa fa-book"></i> Book 
                <span class="pull-right-container">
                  <i class="fa fa-angle-left pull-right"></i>
                </span>
              </a>
						<ul class="treeview-menu">
							<li ><a href="add_book.php"><i class="fa fa-edit"></i> Add</a>
							</li>
							<li ><a href="view_book.php"><i class="fa fa-table"></i> View List 
                                  </a>
							</li>
						</ul>
					</li>

					<li  class="treeview"
						>

						<a href="#"><i class="fa fa-tree"></i> Species 
                <span class="pull-right-container">
                  <i class="fa fa-angle-left pull-right"></i>
                </span>
              </a>
						<ul class="treeview-menu">
							<li ><a href="add_species.php"><i class="fa fa-edit"></i> Add</a>
							</li>
							<li ><a href="view_species.php"><i class="fa fa-table"></i> View List 
                                      </a>
							</li>
						</ul>
					</li>

				</ul>
			</li>

			
			<li  class="treeview"
				>
				<a href="#">
            <i class="fa fa-hdd-o"></i>
            <span>Information</span>
            <span class="pull-right-container">
              <i class="fa fa-angle-left pull-right"></i>
            </span>
          </a>
			
				<ul class="treeview-menu">
					<li ><a href="distribution.php"><i class="fa fa-edit"></i> Add</a>
					</li>
					<li >
						<a href="view_distribution.php"><i class="fa fa-table"></i> View List 
                  </a>

					</li>
				</ul>
			</li>
		</ul>
	</section>
	<!-- /.sidebar -->
</aside>