“Custom Css” corrupts

Hello and thank you for the plugin. Yesterday I wasted half the day to find why “Custom Css” works for some tabs but for some doesn’t.
Finally I found that doesn’t work only constructions like you use in plugin’s style.css:
tab_container_26560 .wpsm_nav-tabs > li.active > a,

The problem is in using function esc_attr in line 71 of content.php. It corrupts css. I think, as it’s not html-code, but css-code it’s nothing dto do for this function there.