You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'index) 
				ORDER BY pp.popularity1 DESC' at line 4. SELECT c.title2, p.*, g.img
				FROM (categories c, products p, product_popularity pp) 
				LEFT JOIN gallery g ON g.u_id = p.id && g.type_id = 0 && g.main = 1
				WHERE pp.p_id = p.id && p.active = 1 && c.id = p.cat_id && p.cat_id IN (79, 292, 64, 228, 55, 371, 243, 452, 62, 142, 389, 325, 262, 460, 488, 412, 454, 2, 3, 10, 158, 12, 13, 290, 15, 16, 17, 407, 176, 18, 159, 19, 20, 21, 317, 22, 38, 283, 23, 24, 280, 25, 379, 140, 26, 28, 293, 162, 29, 195, 30, 32, 33, 34, 35, 178, 36, 37, 272, 252, 39, 40, 41, 42, 401, 294, 43, 334, 45, 160, 46, 139, 179, 468, 473, 347, 346, 483, 5, 386, 343, 344, 222, 268, 277, 4, 297, 310, 309, 313, 312, 299, 326, 321, 303, 302, 304, 307, 301, 300, 308, 305, 392, 306, 311, 322, 298, 319, 315, 314, 318, 316, 251, 459, 403, 476, 485, 381, 402, 497, 414, 399, 446, 48, 495, 493, 499, 498, 49, 390, 461, 348, 477, 175, 413, 479, 463, 486, 50, 487, 467, 471, 475, 6, 165, 226, 345, 341, 397, 51, 8, 56, 60, 242, 57, 52, 494, 365, 141, 53, 214, 58, 411, 61, 63, 406, 496, 67, 163, 54, 415, 66, 68, 69, 328, 229, 480, 342, 474, 271, 363, 278, 388, 465, 78, 442, 73, 351, 74, 374, 75, 462, 417, 76, 470, 77, 373, 481, 444, 261, 295, 296, 256, index) 
				ORDER BY pp.popularity1 DESC