Menu button problem

I’m building a small site with WordPress. One of the menu buttons has three submenus. ([I]e.g[/I]. [B]Photos > [I]childhood, wedding, kids[/I][/B]) When mouseover this button the submenus drop down. Besides, it also has onclick function as usual. As [B]Photos[/B] has no content I don’t want it to have this function. I’d like a visitor can only mouseover [B]Photos[/B] and choose one of this dropped down [B][I]childhood, wedding, kids[/I][/B] pages.

I use WordPress theme which already have menu buttons with dropdown submenus. I installed [B][URL=”http://wordpress.org/extend/plugins/my-page-order/”]My Page Order[/URL][/B] plugin as well to arrange my menu buttons.
In [B]header.php[/B] of WordPress Theme folder there is the code <?php wp_list_pages(‘title_li=&depth=2&sort_column=menu_order’); ?>

What is the solution of this problem?
Thanks in advance.

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