Deactivate OptionTree theme options & add a custom theme page.

register_options_pages

<?php
/**
 * Do not use the default Theme Options page
 */
add_filter( 'ot_use_theme_options', '__return_false' );

/**
 * Hide the Default OptionTree Settings
 */
add_filter( 'ot_show_pages', '__return_false' );

/**
 * Activate Theme Mode
 */
add_filter( 'ot_theme_mode', '__return_true' );

/**
 * Load OptionTree
 */
load_template( trailingslashit( get_template_directory() ) . 'option-tree/ot-loader.php' );

/**
 * Hook to register admin pages 
 */
add_action( 'init', 'register_options_pages' );
  
/**
 * Registers all the required admin pages.
 */
function register_options_pages() {
  
  if ( is_admin() ) {

    // Register the pages
    ot_register_settings( 
      array(
        array( 
          'id'              => 'custom_options',
          'pages'           => array(
            array(
              'id'              => 'test_page',
              'parent_slug'     => 'themes.php',
              'page_title'      => 'Test Page',
              'menu_title'      => 'Test Page',
              'capability'      => 'edit_theme_options',
              'menu_slug'       => 'test-page',
              'icon_url'        => null,
              'position'        => null,
              'updated_message' => 'Test Page updated.',
              'reset_message'   => 'Test Page reset.',
              'button_text'     => 'Save Changes',
              'show_buttons'    => true,
              'screen_icon'     => 'themes',
              'contextual_help' => null,
              'sections'        => array(
                array(
                  'id'          => 'test_section',
                  'title'       => __( 'Test Section', 'motif-core' )
                )
              ),
              'settings'        => array(
                array(
                  'id'          => 'test_section_input',
                  'label'       => 'Test Input',
                  'desc'        => 'Pretty freaking awesome!',
                  'std'         => '',
                  'type'        => 'text',
                  'section'     => 'test_section',
                  'class'       => ''
                )
              )
            )
          )
        )
      )
    );
  
  }

}