prueba

/* Al pasar el mouse: fondo clarito y letra negra */
.categories_container a:hover,
.categories a:hover,
.dropdown-menu a:hover,
.submenu a:hover,
[class*="categories"] a:hover,
[class*="dropdown"] a:hover,
[class*="submenu"] a:hover {
  background-color: #f2f2f2 !important;
  color: #000000 !important;
}