Custom JS snippet for WordPress admin panel

functions.php

<?php

function my_custom_admin_js() {
  echo '<script type="text/javascript">
    var jq = jQuery.noConflict();
    jq("document").ready(function() {
        jq("#0_section_group_li, #0_section_group").hide();
    });
  </script>';
}
add_action( 'admin_head', 'my_custom_admin_js' );