sanitization-1.php

<?php

/**
 * Registers an option sanitization filter.
 *
 * If the option is an "array" option type with "suboptions", you have to use the third param to specify the
 * suboption or suboptions you want the filter to apply to. DO NOT call this without the third parameter on an option
 * that is an array option, because in that case it will apply that filter to the array(), not each member.
 *
 * Use the 'genesis_settings_sanitizer_init' action to be notified when this function is safe to use
 *
 * @since 1.7.0
 *
 * @uses Genesis_Settings_Sanitizer::add_filter()
 *
 * @param string $filter The filter to call (see Genesis_Settings_Sanitizer::$available_filters for options)
 * @param string $option The WordPress option name
 * @param string|array $suboption Optional. The suboption or suboptions you want to filter
 *
 * @return true
 */
function genesis_add_option_filter( $filter, $option, $suboption = null ) {

	return Genesis_Settings_Sanitizer::$instance->add_filter( $filter, $option, $suboption );

}

sanitization-2.php

<?php

	/**
	 * Add sanitization filters to options.
	 *
	 * Associates a sanitization filter to each option (or sub options if they
	 * exist) before adding a reference to run the option through that
	 * sanitizer at the right time.
	 *
	 * @since 1.7.0
	 *
	 * @param string $filter Sanitization filter type
	 * @param string $option Option key
	 * @param array $suboption Optional. Suboption key
	 * @return boolean Returns true when complete
	 */
	function add_filter( $filter, $option, array $suboption = null ) {

		if ( is_array( $suboption ) ) {
			foreach ( $suboption as $so ) {
				$this->options[$option][$so] = $filter;
			}
		} elseif ( is_null( $suboption ) ) {
			$this->options[$option] = $filter;
		} else {
			$this->options[$option][$suboption] = $filter;
		}

		add_filter( 'sanitize_option_' . $option, array( $this, 'sanitize' ), 10, 2 );

		return true;

	}