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WordPress: Adding Custom Classes to wp_nav_menu
The Issue
In WordPress, there is a handy function that displays custom menus that are setup in Appearance > Menus, that function is wp_nav_menu();
. If you are setting up your menus this way (and you should be) I’m sure you are familiar with some of the limitations of what is output on the page. From a design standpoint, these menus can be rather difficult to work with.
There are a few ways to alter the code that is spit out, one of those (and arguably the most powerful way) would be to use a Custom Walker Function…but that’s another beast for another day.
A lot of the time, all we need are some specific classes on certain menu items in order to achieve what we need.
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fig 1.0 classy
Example
As an example, I’m going to show you how to setup a “split menu”, where the site’s logo is centered and has three menu items on either side. This is a popular layout, but impossible* to achieve without some additional classes.
*I’m aware you can use something like :nth-child(), but for those of us supporting older browsers and for other instances where you need classes, that solution isn’t always ideal.
Solution
We are going to add a simple function to either your functions.php
file, or a custom functionality plugin if you’re using one.
The code below does the following:
- If the menu item is item number “three”, it will get a class of “large-margin” — this way you can add a right margin to the menu item that is as wide or wider than the logo you are passing over.
- If the menu item comes after the third menu item, it will get a class of “right-menu” — with this you can target the right menu items and adjust those margins or text alignments specifically.
function custom_nav_class($classes, $item){ if ( $item->menu_order == 3 ) { $classes[] = "large-margin"; } if ( $item->menu_order > 3 ) { $classes[] = "right-menu"; } return $classes; } add_filter('nav_menu_css_class' , 'custom_nav_class' , 10 , 2);
Conclusion
You can play around with this. If you need more menu items to the right/left just adjust the numbers in the function. I have had this function come in handy a few times, so I hope you can get some use out of it.