Wordpress Menu Items don't want to Center

[inistart]

I have some menu items which just don't want to center no matter what I do. I'm really not sure what I'm doing wrong. I feel like it might be a problem with the PHP pulling the menu items (I don't know PHP, it's from a theme) because when I manually add in my own UL of menu items, they center perfectly. Any help would be appreciated!PHP File Code \[code\]<div id="hmenubar"> <?php $navcheck = '' ; ?> <?php $navcheck = wp_nav_menu( array( 'container_class' => 'menu-header', 'theme_location' => 'primary' , 'menu_class' => 'nav', 'fallback_cb' => '', 'echo' => false ) ); ?> <?php if ($navcheck == '') { ?> <ul class="nav"> <?php wp_list_pages('title_li=&sort_column=menu_order'); ?> </ul> <?php } else echo($navcheck); ?> </div> \[/code\]CSS Code \[code\]#hmenu_container {height: 30%;width:100%;display: block;text-align; center;}#hmenubar {margin: 0 auto; }#hmenubar ul {font-family: 'Calligraffitti', cursive;font-size: 1.5rem;display: inline-block;list-style: none;margin: 0 auto;}\[/code\]Edit: HTML of List\[code\]<div class="menu-header"><ul id="menu-photography" class="nav"><li id="menu-item-15" class="menu-item menu-item-type-custom menu-item-object-custom current-menu-item current_page_item menu-item-home menu-item-15"><a href="http://stackoverflow.com/">Home</a></li><li id="menu-item-13" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-13"><a href="http://stackoverflow.com/blog/">Blog</a></li><li id="menu-item-14" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-14"><a href="http://stackoverflow.com/about/">About</a></li><li id="menu-item-21" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-21"><a href="http://stackoverflow.com/gallery/">Gallery</a></li><li id="menu-item-20" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-20"><a href="http://stackoverflow.com/projects/">Projects</a></li><li id="menu-item-16" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-16"><a href="http://stackoverflow.com/insquares">Insquar.es</a></li><li id="menu-item-17" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-17"><a href="http://stackoverflow.com/instagram">Instagram</a></li></ul></div> \[/code\]