@Mikhail: In Catch Responsive Pro theme, if you want to totally remove Header Search and Social icons. Then you can go to “Appearance => Customize => Theme Options => Header Right Sidebar Options” and then check in “Check to disable Header Right Sidebar”. But if you want to remove only search and add in social. Then you can go to “Appearance => Widget” and then add only “CT: Social Icons” to Header Right Sidebar.