how to display wordpress categories in a drop down menu

wordpress tutorial, how to display wordpress categories in a drop down menu. For showing the categories in drop down menu just use our following code.

how to display wordpress categories in a drop down menu

You just need to copy paste following code in put in functions.php file.

<li id="categories"><h2><?php _e('Posts by Category'); ?></h2>
 <?php wp_dropdown_categories('show_option_none=Select category'); ?>

<script type="text/javascript"><!--
 var dropdown = document.getElementById("cat");
 function onCatChange() {
 if ( dropdown.options[dropdown.selectedIndex].value > 0 ) {
 location.href = "<?php echo get_option('home');
?>/?cat="+dropdown.options[dropdown.selectedIndex].value;
 }
 }
 dropdown.onchange = onCatChange;
--></script>
</li>

For more information you can use the following code.