CLesson::GetList

static function GetList($arOrder = 'will be ignored', $arFilter = array())
{
	// We must replace '...ID' => '...LESSON_ID', 
	// where '...' is some operation (such as '!', '<=', etc.)
	foreach ($arFilter as $key => $value)
	{
		// If key ends with 'ID'
		if ((mb_strlen($key) >= 2) && (mb_strtoupper(mb_substr($key, -2)) === 'ID'))
		{
			// And prefix before 'ID' doesn't contains letters
			if ( ! preg_match ("/[a-zA-Z_]+/", mb_substr($key, 0, -2)) )
			{
				$prefix = '';
				if (mb_strlen($key) > 2)
					$prefix = mb_substr($key, 0, -2);

				$arFields[$prefix . 'LESSON_ID'] = $arFilter[$key];
				unset ($arFilter[$key]);
			}
		}
	}

	return (CLearnLesson::GetList(array(), $arFilter));
}