http://sundari-webdesign.com/divi-bottom-aligning-the-last-element-in-a-multi-column-row/

To achieve the below example with buttons below a blurb module. If the text in each column has a different length, the buttons are not nicely aligned.

To fix this:

1. In the row settings » design » equalize column heights = true
2. Set the position on the advanced module tab to relative or absolute and bottom

Alternative:

1. In the row settings » Custom CSS » CSS Class = hws-align-bottom-column
2. Then add the following CSS to the Divi options or in a child theme

/* -- START Align bottom column -- */
.hws-align-bottom-column .et_pb_column {padding-bottom: 50px;}
.hws-align-bottom-column .et_pb_button_module_wrapper {position: absolute; bottom: 0; left: 0; right: 0; margin: auto;}
/* -- END Align bottom column -- */
Code language: CSS (css)