src/properties/class-papi-property-dropdown.php
public function load_value( $value, $slug, $post_id ) {
		$value = maybe_unserialize( $value );

		return papi_maybe_json_decode( $value, $this->get_setting( 'multiple' ) );
	}
public function load_value( $value, $slug, $post_id ) {
		$value = maybe_unserialize( $value );

		return papi_maybe_json_decode( $value, $this->get_setting( 'multiple' ) );
	}
Change value after it's loaded from the database.

@param  mixed  $value
@param  string $slug
@param  int    $post_id

@return mixed