This plugin adds hooks-editing interface in theme options for "rtPanel Theme Framework" - https://wordpress.org/themes/rtpanel
Install the plugin from the 'Plugins' section in your dashboard (Plugins > Add New > Search for rtPanel Hooks Editor).
Alternatively you can download the plugin from the repository. Unzip it and upload it to the plugins folder of your WordPress installation (wp-content/plugins/ directory of your WordPress installation).
Activate it through the 'Plugins' section.